Crop and Environment最新文献

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From wild to cultivated crops: general shift in morphological and physiological traits for yield enhancement following domestication 从野生到栽培作物:驯化后提高产量的形态和生理特征的总体变化
Crop and Environment Pub Date : 2024-03-14 DOI: 10.1016/j.crope.2024.03.001
Zhangying Lei , Ziliang Li , Wangfeng Zhang , Daohua He , Yali Zhang
{"title":"From wild to cultivated crops: general shift in morphological and physiological traits for yield enhancement following domestication","authors":"Zhangying Lei ,&nbsp;Ziliang Li ,&nbsp;Wangfeng Zhang ,&nbsp;Daohua He ,&nbsp;Yali Zhang","doi":"10.1016/j.crope.2024.03.001","DOIUrl":"10.1016/j.crope.2024.03.001","url":null,"abstract":"<div><p>Crop species undergo artificial selection as a result of domestication under agricultural field conditions. However, there is limited information on the pattern of how domestication alters leaf photosynthesis, morphology, and biomass and its allocation. In this review, we firstly introduced the concept of crop domestication, provided clarity on crop domestication syndrome, and emphasized the significance in the conservation and re-utilization of wild crop resources. Next, we discussed the variation in crop biomass and yield using a compiled dataset comprised of 54 wild and cultivated species. We subsequently summarized the general shift in physiological traits including higher growth and photosynthetic rates, light use efficiency, leaf area, chlorophyll, and nitrogen content, which may be associated with greater biomass and yield during crop domestication. We ended by identifying what has been learned on how domestication optimized plant performance to produce today's crops, and by providing some examples of how this knowledge was being exploited and redirected to drive crop improvement in the near future. These general patterns following crop domestication present several implications for offering valuable insights into shaping future genetic engineering targets and improving agricultural management practices.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 3","pages":"Pages 138-146"},"PeriodicalIF":0.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X24000108/pdfft?md5=35268ee55bf73fc7b48db300ab688afa&pid=1-s2.0-S2773126X24000108-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Light energy utilization and measurement methods in crop production 作物生产中的光能利用和测量方法
Crop and Environment Pub Date : 2024-02-28 DOI: 10.1016/j.crope.2024.02.003
Zhaohong Lu, Jing Gao, Qi Wang, Zili Ning, Xianming Tan, Yi Lei, Jie Zhang, Jiaqi Zou, Lingxuan Wang, Chenyao Yang, Wenyu Yang, Feng Yang
{"title":"Light energy utilization and measurement methods in crop production","authors":"Zhaohong Lu,&nbsp;Jing Gao,&nbsp;Qi Wang,&nbsp;Zili Ning,&nbsp;Xianming Tan,&nbsp;Yi Lei,&nbsp;Jie Zhang,&nbsp;Jiaqi Zou,&nbsp;Lingxuan Wang,&nbsp;Chenyao Yang,&nbsp;Wenyu Yang,&nbsp;Feng Yang","doi":"10.1016/j.crope.2024.02.003","DOIUrl":"10.1016/j.crope.2024.02.003","url":null,"abstract":"<div><p>Efficient solar energy utilization is a crucial determinant of crop yield formation. Moreover, various planting methods have dissimilar impacts on crop solar energy utilization and its measurement methods. This study examined the differences in solar energy utilization between monoculture and intercropping by considering density configuration, plant type arrangement, timing schedule, and spatial layout. We further evaluated the traditional methodologies versus remote sensing technology for solar energy measurements and described the differences in calculation methods for monoculture and intercropping, drawing from the photosynthesis model. Additionally, we discussed the potential advantages and limitations of employing remote sensing technology for the monitoring and prediction of solar energy utilization in field crops.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 2","pages":"Pages 91-100"},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X24000030/pdfft?md5=d685231be289bb969ad4b319eadab612&pid=1-s2.0-S2773126X24000030-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140465230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Environmental factors influence the responsiveness of potato tuber yield to growing season precipitation 环境因素影响马铃薯块茎产量对生长季降水量的响应性
Crop and Environment Pub Date : 2024-02-23 DOI: 10.1016/j.crope.2024.02.002
Funian Zhao , Qiang Zhang , Jun Lei , Heling Wang , Kai Zhang , Yue Qi
{"title":"Environmental factors influence the responsiveness of potato tuber yield to growing season precipitation","authors":"Funian Zhao ,&nbsp;Qiang Zhang ,&nbsp;Jun Lei ,&nbsp;Heling Wang ,&nbsp;Kai Zhang ,&nbsp;Yue Qi","doi":"10.1016/j.crope.2024.02.002","DOIUrl":"10.1016/j.crope.2024.02.002","url":null,"abstract":"<div><p>Understanding how environmental factors influence the responsiveness of crop yield to growing season precipitation (GSP) can reduce the risk of yield fluctuations, ensuring stable crop production. This study involved the cultivation of rainfed potatoes at three locations within the climatic transition zone of Northwest China. We employed stepwise linear regression and machine learning techniques to pinpoint the key environmental factors influencing potato tuber yield and the yield-precipitation relationship. The slope of the water-limited yield potential relationship for potatoes was determined to be 172.1 ​kg ​ha<sup>−1</sup> ​mm<sup>−1</sup>, with an intercept at 121.2 ​mm. The potato tuber yield exhibited an upward trend with increasing GSP but declined once the precipitation exceeded 400 ​mm. However, GSP alone explained up to 30% of the variability in potato tuber yield. Factors such as soil moisture at planting, maximum temperatures during the tuber stolon initiation and bulking stages, diurnal temperature fluctuations at maturity, and excessive precipitation events during the growing season significantly influenced potato tuber yield, and consequently, the relationship between yield and GSP. Conversely, climatic factors accounted for more than 63% of the variation in potato tuber yield, with the multiple linear regression model yielding the best results. This was especially evident when the yield-precipitation relationship was categorized into two groups based on the amount and distribution of GSP, maximum temperature, and radiation levels. This analysis suggested that preventing unnecessary water evaporation when precipitation is low, improving drainage when precipitation is high, and planting potato on an optimal date can advance potato production.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 2","pages":"Pages 112-122"},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X24000029/pdfft?md5=c9b986ee4fcc2b1ccae6e690fd884250&pid=1-s2.0-S2773126X24000029-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
From hidden to visual K deficiency in plants: Integration of subcellular K+ distribution and photosynthetic performance 植物从隐性到显性 K 缺乏:亚细胞 K+ 分布与光合作用性能的整合
Crop and Environment Pub Date : 2024-02-15 DOI: 10.1016/j.crope.2024.02.001
Hehe Gu, Zhifeng Lu, Tao Ren, Jianwei Lu
{"title":"From hidden to visual K deficiency in plants: Integration of subcellular K+ distribution and photosynthetic performance","authors":"Hehe Gu,&nbsp;Zhifeng Lu,&nbsp;Tao Ren,&nbsp;Jianwei Lu","doi":"10.1016/j.crope.2024.02.001","DOIUrl":"10.1016/j.crope.2024.02.001","url":null,"abstract":"<div><p>The earliest occurrence of chlorosis at the tips of the oldest leaves is widely recognized as a reliable indicator for diagnosing potassium (K) deficiency and determining the need for K fertilizer. However, hidden K deficiency, typically associated with a decrease in individual leaf photosynthetic area, precedes the onset of visible yellowing symptoms. These concealed symptoms pose challenges for the early diagnosis of K deprivation in plants. The two distinct stages of deficiency exhibit different photosynthetic performances, which are speculated to be closely linked to the subcellular K<sup>+</sup> distribution. This minireview focuses on investigating K<sup>+</sup> dynamics across subcellular compartments, along with the involvement of functional transporter proteins and ion channels during K deficiency. We propose potential mechanisms by which subcellular K<sup>+</sup> regulates photosynthetic capacity under both hidden and visual K deficiency conditions, which sheds new light on the diagnosis of K deficiency. Additionally, future research prospects and areas deserving further investigation are also outlined.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 2","pages":"Pages 84-90"},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X24000017/pdfft?md5=5415ce86d015e980bdec4c5e2b27840f&pid=1-s2.0-S2773126X24000017-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139890308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ROS signaling and its involvement in abiotic stress with emphasis on heat stress-driven anther sterility in plants ROS 信号及其在非生物胁迫中的参与,重点是热胁迫驱动的植物花药不育症
Crop and Environment Pub Date : 2023-12-29 DOI: 10.1016/j.crope.2023.12.002
Wenbin Xu , Yuanmei Miao , Jie Kong , Keith Lindsey , Xianlong Zhang , Ling Min
{"title":"ROS signaling and its involvement in abiotic stress with emphasis on heat stress-driven anther sterility in plants","authors":"Wenbin Xu ,&nbsp;Yuanmei Miao ,&nbsp;Jie Kong ,&nbsp;Keith Lindsey ,&nbsp;Xianlong Zhang ,&nbsp;Ling Min","doi":"10.1016/j.crope.2023.12.002","DOIUrl":"10.1016/j.crope.2023.12.002","url":null,"abstract":"<div><p>With global warming, crop plants are challenged by heat stress during reproductive growth, leading to male sterility and yield reduction. The balance between reactive oxygen species (ROS) generation and scavenging is disrupted by stress, resulting in oxidative stress which is harmful to crop growth. However, recent advances have shown that ROS signaling via proteins that sense the redox state is positive for plant performance under stress. ROS signaling is also involved in regulating anther development, such as timely tapetum degeneration. We summarize recent progress in uncovering the mechanism of heat stress effects on ROS homeostasis and discuss the relationship between oxidative stress and metabolic disorder, which is often observed during anther development under heat stress. We propose experimental and breeding strategies to improve field crop tolerance to heat stress.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 2","pages":"Pages 65-74"},"PeriodicalIF":0.0,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X23000795/pdfft?md5=b5b03528f47c4a0291e12394f8ee4fe0&pid=1-s2.0-S2773126X23000795-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139196247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Response of leaf day respiration in C4 plants to irradiance and vapour pressure deficit C4 植物叶昼呼吸对辐照度和蒸汽压不足的响应
Crop and Environment Pub Date : 2023-12-22 DOI: 10.1016/j.crope.2023.12.001
Boya Liu , Xuming Wang , Qi Liu , Yining Xu , Ashraf Muhammad Arslan , Dingming Zheng , Lei Li , Xiaoying Gong
{"title":"Response of leaf day respiration in C4 plants to irradiance and vapour pressure deficit","authors":"Boya Liu ,&nbsp;Xuming Wang ,&nbsp;Qi Liu ,&nbsp;Yining Xu ,&nbsp;Ashraf Muhammad Arslan ,&nbsp;Dingming Zheng ,&nbsp;Lei Li ,&nbsp;Xiaoying Gong","doi":"10.1016/j.crope.2023.12.001","DOIUrl":"10.1016/j.crope.2023.12.001","url":null,"abstract":"<div><p>Leaf day respiration rate (<em>R</em><sub>L</sub>) plays a crucial role in the global carbon cycle. However, <em>R</em><sub>L</sub> of C<sub>4</sub> species has not been sufficiently studied and its response to environmental factors is largely unknown. This work studied the response of <em>R</em><sub>L</sub> of three C<sub>4</sub> species, <em>Setaria viridis</em>, <em>Sorghum sudanense,</em> and <em>Zea mays</em>, to alterations in the vapour pressure deficit (VPD) and irradiance of the growth environment. <em>R</em><sub>L</sub> was estimated using the Kok method (<em>R</em><sub>L Kok</sub>) and an improved method that combined gas exchange and chlorophyll fluorescence measurements (<em>R</em><sub>L Yin</sub>). On average, shade treatment led to a 24% reduction in <em>R</em><sub>L Yin</sub> and a 20% reduction in respiration in the dark (<em>R</em><sub>Dk</sub>), while a consistent VPD effect on <em>R</em><sub>L</sub> was not observed. <em>R</em><sub>L</sub> and <em>R</em><sub>Dk</sub> were positively correlated with nitrogen content per leaf area and net CO<sub>2</sub> assimilation rate but were not correlated with the capacity of carboxylation enzymes. We found a non-significant light inhibition of respiration (1 ​± ​2%), contradicting the assumption that respiration is inhibited by light and affected by light intensity. Our findings indicate that assuming <em>R</em><sub>L</sub> to be equal to <em>R</em><sub>Dk</sub> at the same temperature is a straightforward but reliable approach to model respiration of the examined C<sub>4</sub> species.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 2","pages":"Pages 101-111"},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X23000783/pdfft?md5=6128c9e12f62dedbc897c3d2e41f1cc4&pid=1-s2.0-S2773126X23000783-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139016124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Balancing food security, vertebrate biodiversity, and healthy rice agroecosystems in Southeast Asia 平衡东南亚的粮食安全、脊椎动物生物多样性和健康的水稻农业生态系统
Crop and Environment Pub Date : 2023-12-06 DOI: 10.1016/j.crope.2023.11.005
Catherine R. Propper , Jodi L. Sedlock , Richard E. Smedley , Oliver Frith , Molly E. Shuman-Goodier , Alejandro Grajal-Puche , Alexander M. Stuart , Grant R. Singleton
{"title":"Balancing food security, vertebrate biodiversity, and healthy rice agroecosystems in Southeast Asia","authors":"Catherine R. Propper ,&nbsp;Jodi L. Sedlock ,&nbsp;Richard E. Smedley ,&nbsp;Oliver Frith ,&nbsp;Molly E. Shuman-Goodier ,&nbsp;Alejandro Grajal-Puche ,&nbsp;Alexander M. Stuart ,&nbsp;Grant R. Singleton","doi":"10.1016/j.crope.2023.11.005","DOIUrl":"10.1016/j.crope.2023.11.005","url":null,"abstract":"<div><p>Rice is the dominant food staple and an important economic resource throughout Asia. Lowland rice production also provides important wetland habitats in support of biodiversity that may provide ecosystem services back to the rice agroecosystems. This review summarizes the literature on the ecosystem benefits that amphibians, birds, bats, and rodents support in the context of the Southeast Asia rice agroecosystems. The literature provides evidence that these taxonomic groups contribute to cultural, regulatory, and provisioning services in support of smallholder farmers and may allow for economic benefits through reduced use of chemical inputs into crops. We encourage a multipronged research approach to bring stakeholders together to provide structured and scalable education programs that will lead to improved human and agroecosystem health through the promotion of understanding the positive feedbacks from biodiversity in these important agricultural wetland habitats.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 1","pages":"Pages 43-50"},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X2300076X/pdfft?md5=1e3217f51c74842e3740a30e2d625a4f&pid=1-s2.0-S2773126X2300076X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138620114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the responses of crop photosynthesis to CO2 elevation at the molecular, physiological, and morphological levels toward increasing crop production 从分子、生理和形态学层面探索作物光合作用对二氧化碳升高的反应,以提高作物产量
Crop and Environment Pub Date : 2023-12-02 DOI: 10.1016/j.crope.2023.11.006
Daisuke Sugiura , Yin Wang , Masaru Kono , Yusuke Mizokami
{"title":"Exploring the responses of crop photosynthesis to CO2 elevation at the molecular, physiological, and morphological levels toward increasing crop production","authors":"Daisuke Sugiura ,&nbsp;Yin Wang ,&nbsp;Masaru Kono ,&nbsp;Yusuke Mizokami","doi":"10.1016/j.crope.2023.11.006","DOIUrl":"10.1016/j.crope.2023.11.006","url":null,"abstract":"<div><p>Exploring the impact of elevated CO<sub>2</sub> on photosynthesis is vital for understanding plant responses to climate change. In C<sub>3</sub> plants, elevated CO<sub>2</sub> concentrations generally enhance CO<sub>2</sub> assimilation by increasing chloroplast CO<sub>2</sub> concentration. However, the underlying mechanisms are complex since photosynthesis involves multiple physiological processes operating at different time scales and varying among plant species. In this review, we focused on the responses of key photosynthetic processes in crop, including CO<sub>2</sub> diffusion conductances such as stomatal conductance (g<sub>s</sub>), mesophyll conductance (g<sub>m</sub>), photochemical reactions, the Calvin-Benson cycle, and related metabolic pathways. Short-term exposure to elevated CO<sub>2</sub> often decreases g<sub>s</sub> and g<sub>m</sub> while increasing the electron transport rate. However, long-term exposure to elevated CO<sub>2</sub> can decrease photosynthetic capacity due to coordinated downregulation of multiple processes, particularly when the sink‒source ratio declines. To enhance plant productivity under elevated CO<sub>2</sub>, it is crucial to maintain or enhance sink activity and understand the CO<sub>2</sub> response mechanisms at the molecular, physiological, and morphological levels. This review provides an update on the short- and long-term responses of g<sub>s</sub>, g<sub>m</sub>, electron transport system, and carbon assimilation metabolism to elevated CO<sub>2</sub>. Furthermore, it offers a perspective on improving crop production in the future with elevated CO<sub>2</sub> levels.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 2","pages":"Pages 75-83"},"PeriodicalIF":0.0,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X23000771/pdfft?md5=afbd7b6ef8ba441d6024e80e4fc87563&pid=1-s2.0-S2773126X23000771-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138626589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing maize radiation use efficiency under high planting density by shaping canopy architecture with a plant growth regulator 用植物生长调节剂塑造冠层结构,提高高种植密度下玉米的辐射利用效率
Crop and Environment Pub Date : 2023-12-01 DOI: 10.1016/j.crope.2023.11.004
Guanmin Huang, Yuling Guo, Weiming Tan, Mingcai Zhang, Zhaohu Li, Yuyi Zhou, Liusheng Duan
{"title":"Enhancing maize radiation use efficiency under high planting density by shaping canopy architecture with a plant growth regulator","authors":"Guanmin Huang,&nbsp;Yuling Guo,&nbsp;Weiming Tan,&nbsp;Mingcai Zhang,&nbsp;Zhaohu Li,&nbsp;Yuyi Zhou,&nbsp;Liusheng Duan","doi":"10.1016/j.crope.2023.11.004","DOIUrl":"10.1016/j.crope.2023.11.004","url":null,"abstract":"<div><p>Optimized maize (<em>Zea mays</em> L.) canopy architecture enhances density-tolerance. DHEAP (N, N-Diethyl-2-hexanoyl oxygen radicals-ethyl amine (2-ethyl chloride) phosphonic acid salt) has been shown to increase maize upper canopy strata compactness, but its overall effect on the whole canopy structure and how it shapes the canopy structure remain unclear. This study examined how DHEAP affected the canopy structure of maize hybrids Zhengdan 958 (ZD958) and Xianyu 335 (XY335), with distinct canopy structures, under different planting densities. The results showed that DHEAP increased the leaf orientation value (LOV) of upper canopy strata by 8.0% while reducing middle and lower strata LOV by 11.7% and 18.4%, respectively. This indicates that DHEAP shaped a canopy structure that was compact in the upper strata and loose in the middle and lower strata. Multiple linear regression analysis showed that leaf angle had a greater impact on the upper canopy strata, while leaf auricle size had a greater impact on the middle and lower canopy strata. After DHEAP treatment, light transmission above different canopy strata increased at the reproductive stage. Concurrently, the middle canopy captured more light energy, enhanced yield formation, and boosted radiation use efficiency by 21.9% under high density. In terms of grain yield, DHEAP treatment resulted in a 9.1% and 23.9% increase in ZD958 and XY335, respectively, under high-density conditions. These results suggest that DHEAP shaped the maize canopy structure with high density tolerance, improved the distribution of light within the canopy, and increased grain yield.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 1","pages":"Pages 51-63"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X23000758/pdfft?md5=0354ac85732a18c2db26aa8d91a269ad&pid=1-s2.0-S2773126X23000758-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138614673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Agronomic assessment of the yield variability and yield gap of maize in Bhutan 不丹玉米产量变异性和产量差距的农艺评估
Crop and Environment Pub Date : 2023-12-01 DOI: 10.1016/j.crope.2023.11.003
Passang Wangmo , Kinzang Thinley , Taiken Nakashima , Yoichiro Kato
{"title":"Agronomic assessment of the yield variability and yield gap of maize in Bhutan","authors":"Passang Wangmo ,&nbsp;Kinzang Thinley ,&nbsp;Taiken Nakashima ,&nbsp;Yoichiro Kato","doi":"10.1016/j.crope.2023.11.003","DOIUrl":"10.1016/j.crope.2023.11.003","url":null,"abstract":"<div><p>Maize is the staple food crop in Bhutan, which has not achieved national food self-sufficiency. On-farm assessment of yield variability would provide insights into the priorities for Bhutan's maize development program. Here, we conducted three studies in Bhutan: a household survey, on-station experiment, and on-farm monitoring. First, we interviewed 100 households and collected information on maize crop management options and farming characteristics. Second, we evaluated maize growth at two research stations in different elevation zones (640 and 1,700 ​m a.s.l.). Third, we harvested maize from 25 farm fields at low and high elevations. The gaps between potential yield (with the best management practices at the research stations) and average farm yield and between the best and average farm yields were 53% and 23%, respectively, at the low elevation, and 23% and 20%, respectively, at the high elevation. The classification and regression tree (CART) model showed that field location (distance from the farmer's home), seed source (certified vs. self-produced), and the number of household members involved in farming were the key farming characteristics that affected yield variability, and the manure application regime, urea application, sowing method, and weeding frequency were key management practices. Our results suggest that future research should clarify the most suitable sowing methods and nutrient and weed management regimes, and identify optimal cultivars for each elevation zone, with the goal of developing crop management guidelines for smallholder farmers in Bhutan.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"3 1","pages":"Pages 25-32"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X23000746/pdfft?md5=e14607b37efbe183e5935830f18bbc23&pid=1-s2.0-S2773126X23000746-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138625897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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