Crop and Environment最新文献_第4页

Responses to elevated daytime air and canopy temperature during panicle development in four rice genotypes under paddy conditions in large field chambers 大田条件下4种水稻基因型穗部发育对日间空气和冠层温度升高的响应

Crop and Environment Pub Date : 2023-09-01 DOI: 10.1016/j.crope.2023.04.004

Estela M. Pasuquin , Philip L. Eberbach , Toshihiro Hasegawa , Tanguy Lafarge , Dome Harnpichitvitaya , Len J. Wade

{"title":"Responses to elevated daytime air and canopy temperature during panicle development in four rice genotypes under paddy conditions in large field chambers","authors":"Estela M. Pasuquin , Philip L. Eberbach , Toshihiro Hasegawa , Tanguy Lafarge , Dome Harnpichitvitaya , Len J. Wade","doi":"10.1016/j.crope.2023.04.004","DOIUrl":"https://doi.org/10.1016/j.crope.2023.04.004","url":null,"abstract":"<div><p>Rising air temperatures have the capacity to impact rice yields in future climates. Studies in large temperature-controlled field chambers were established to examine the responses of four contrasting rice genotypes to elevated daytime temperatures (ET) during reproductive development under paddy conditions. Field chambers were effective in raising mean above-canopy maximum daytime temperatures from 29.9 to 41.1°C during 12 d of ET treatment (68–80 d after emergence, DAE), while increased transpiration under ET resulted in lowering of mean lower-canopy maximum temperature to 33.2°C. Nevertheless, the earliest genotype Vandana encountered a hot spell of 37.0°C at 68–74 DAE in the lower canopy at its late reproductive stage, which exceeded the spikelet sterility threshold of 33.7°C, so its spikelet fertility, grain number and grain yield were reduced under ET. Genotypes differed in the extent of canopy cooling, with less reduction in Vandana and IR64 than in N22 and Takanari. For canopy cooling to be effective, stratification of air layers must occur within the canopy, which was more effective under the shorter and denser canopy of N22 and Takanari (plant height of 70–80 cm) than under IR64 (90–110 cm) and Vandana (115–130 cm). Genotypes with appropriate canopy structures should be chosen for high vapour pressure deficit (VPD) conditions. Both maximum canopy temperature and VPD need to be specified to define the critical threshold for heat tolerance. Takanari was notable for greater leaf area retention and greater leaf photosynthetic capacity due to the maintenance of a higher internal leaf CO<sub>2</sub> concentration, which led to higher spikelet and grain numbers and higher yield potential under ET conditions.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 3","pages":"Pages 147-156"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneously improving grain yield and water and nutrient use efficiencies by enhancing the harvest index in rice 通过提高水稻收获指数，同时提高粮食产量和水分养分利用效率

Crop and Environment Pub Date : 2023-09-01 DOI: 10.1016/j.crope.2023.07.001

Jianchang Yang , Jianhua Zhang

{"title":"Simultaneously improving grain yield and water and nutrient use efficiencies by enhancing the harvest index in rice","authors":"Jianchang Yang , Jianhua Zhang","doi":"10.1016/j.crope.2023.07.001","DOIUrl":"https://doi.org/10.1016/j.crope.2023.07.001","url":null,"abstract":"<div><p>Global agriculture is facing the major challenge of providing enough food for a growing population while increasing resource use efficiency. The harvest index (HI) is an independent variable in the function not only for crop yield (biomass × HI) but also for water productivity (HI × biomass / water transpired) and nutrient productivity (HI × biomass / nutrient absorbed by plants) in crops. Therefore, enhancement in HI could simultaneously improve grain yield and water and nutrient use efficiencies in rice. An increase in the grain-leaf ratio (the ratio of the total number of spikelets to the leaf area at heading time) to coordinate source-sink relationships, an increase in the sugar-spikelet ratio [the ratio of the amount of nonstructural carbohydrates (NSC) in the stems to the total number of spikelets at heading time] to enhance sink strength and NSC remobilization in stems during grain filling, and an increase in the percentage of productive tillers to improve canopy structure are the three important agronomic and physiological approaches to increase HI. The adoption of an alternate wetting and moderate drying irrigation regime and the use of the “three-based on” application technology of nitrogen fertilizer (based on the soil fertility, leaf color, and variety in rice) are two major crop management techniques to increase HI. Further studies are needed to elucidate the role of HI in reducing environmental risk, the association of an enhanced HI by more remobilization of prestored NSC in stems during grain filling with lodging resistance, and the relationship between HI and grain quality in rice.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 3","pages":"Pages 157-164"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49732590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Progress and challenges of rice ratooning technology in Fujian Province, China 福建水稻再生技术的进展与挑战

Crop and Environment Pub Date : 2023-09-01 DOI: 10.1016/j.crope.2023.05.001

Hongfei Chen, Feifei Yao, Yuncheng Yang, Zhixing Zhang, Changxun Fang, Ting Chen, Wenxiong Lin

{"title":"Progress and challenges of rice ratooning technology in Fujian Province, China","authors":"Hongfei Chen, Feifei Yao, Yuncheng Yang, Zhixing Zhang, Changxun Fang, Ting Chen, Wenxiong Lin","doi":"10.1016/j.crope.2023.05.001","DOIUrl":"https://doi.org/10.1016/j.crope.2023.05.001","url":null,"abstract":"<div><p>Rice ratooning is a resource-saving and environment-friendly cropping system. It is therefore critical to accelerating the development of ratoon rice production, which has become an important guarantee to stabilize the rice planting area, improve the self-sufficiency rate of rice, and increase farmers' income in Fujian Province. This paper summarized the general rice production trend, the research progress of mechanically harvested ratoon rice technology in variety selection (breeding), fertilizer and water management, and stubble height management. Rice cultivars such as Yongyou 1540, Yongyou 4949, Longliangyouhuazhan, and Y-liangyou 900 were used in farmers' fields in major ratoon rice growing counties such as Pucheng, Jianyang, and Fuqing. The demonstration fields with the application of the ‘3–2–1’ mechanized rice ratooning technology achieved an annual yield of more than 15.00 t ha<sup>−1</sup> for seven consecutive years. In 2021 and 2022, the yield of ratoon crop by the application of the ‘3–2–1’ mechanized rice ratooning technology reached 9.29 and 9.48 t ha<sup>−1</sup>, respectively. In this review, the challenges for the sustainable development of mechanized ratoon rice production were also discussed, and the countermeasures and policy interventions for promoting sound ratoon rice system in Fujian were further proposed.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 3","pages":"Pages 121-125"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Progress and challenges of rice ratooning technology in Sichuan Province, China 四川水稻再生产技术的进展与挑战

Crop and Environment Pub Date : 2023-09-01 DOI: 10.1016/j.crope.2023.04.006

Peng Jiang , Lin Zhang , Chao Chen , Xingbing Zhou , Mao Liu , Hong Xiong , Xiaoyi Guo , Yongchuan Zhu , Fuxian Xu

{"title":"Progress and challenges of rice ratooning technology in Sichuan Province, China","authors":"Peng Jiang , Lin Zhang , Chao Chen , Xingbing Zhou , Mao Liu , Hong Xiong , Xiaoyi Guo , Yongchuan Zhu , Fuxian Xu","doi":"10.1016/j.crope.2023.04.006","DOIUrl":"https://doi.org/10.1016/j.crope.2023.04.006","url":null,"abstract":"<div><p>Sichuan Province is the primary region of ratoon rice production in China. This review summarizes the research progress of theories and technologies relating to the efficient cultivation of high-yielding ratoon rice based on the following: (1) ratoon rice planting area in Sichuan can be divided into three climatic zones based on the thermal energy availability, i.e. highly suitable, suitable, and sub-suitable zones; (2) grain yield in the ratoon season in Sichuan is 1.80–3.90 t ha<sup>−1</sup> lower than that in southeastern and central China. The lower ratoon season yield in Sichuan was associated with fewer panicles m<sup>−2</sup> and spikelets panicle<sup>−1</sup>; (3) the effects of rice cultivars selection, optimal nitrogen fertilizer and water management, timely harvest of the main crop, suitable rice stubble height, and sheath blight control on improving the ratooning ability of rice cultivars were examined; (4) factors restricting ratoon rice production in Sichuan include unstable ratoon rice yields, lack of suitable rice cultivars as simplified cultivating for ratoon rice, lack of high-efficiency and specialized rice harvester for ratoon rice, large yield gap between demonstration area and farmer’ paddy fields, and rolling damage from mechanical harvesting of main crop; and (5) new ratoon rice technologies relating to future development trends in Sichuan are clarified, including simplified cultivation techniques, integration of agricultural machinery and agronomy techniques, screening high-efficiency and specialized rice harvester, and desirable traits for breeding rice cultivars with strong ratooning ability and suitable growth duration in ratoon rice system.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 3","pages":"Pages 111-120"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated impacts of irrigation and nitrogen management for balancing winter wheat yield and greenhouse gas emissions 灌溉和氮肥管理对冬小麦产量和温室气体排放平衡的综合影响

Crop and Environment Pub Date : 2023-09-01 DOI: 10.1016/j.crope.2023.06.001

Hongzheng Shen, Shilei Li, Kexin Sun, Yunhe Gao, Yanxin Liu, Xiaoyi Ma

{"title":"Integrated impacts of irrigation and nitrogen management for balancing winter wheat yield and greenhouse gas emissions","authors":"Hongzheng Shen, Shilei Li, Kexin Sun, Yunhe Gao, Yanxin Liu, Xiaoyi Ma","doi":"10.1016/j.crope.2023.06.001","DOIUrl":"https://doi.org/10.1016/j.crope.2023.06.001","url":null,"abstract":"<div><p>Irrigation and nitrogen (N) input are effective methods of balancing crop yields and greenhouse gas (GHG) emissions. However, the effects of irrigation and N management on the GHG emission of winter wheat production systems have not yet been well documented. Therefore, we conducted 2-year field experiments on winter wheat and studied the effects of irrigation and N reduction/replacement on GHG emissions, grain yield, global warming potential (GWP), and GHG emission intensity (GHGI). The winter wheat was irrigated once or twice with 60 or 90 mm each time. Five N reduction/replacement treatments were no N application (CK), 25% traditional urea (U) reduction (75%U), traditional U (U), 25% reduction in polymer-coated U (PCU), and 25% reduction in traditional U combined with organic fertilizers (U + OM). The results indicated that N reduction/replacement significantly reduced N<sub>2</sub>O emissions, but had no significant effect on CH<sub>4</sub> emissions. Soil water-filled pore space was the same key factor affecting the emission fluxes of N<sub>2</sub>O and CH<sub>4</sub>. Soil temperature significantly affected the fluxes of CH<sub>4</sub> (P < 0.001). Irrigation treatment did not exhibit a significant effect on grain yield, but high irrigation input increased the GWP and GHGI. Compared with U, the grain yield of CK, 75%U, PCU, and U + OM increased by −46%, −9.2%, −1.8%, and 5.4%, respectively; GWP decreased by 35.9%, 11.6%, 7.3%, and 2.7%, respectively; and GHGI decreased by −22.1%, 3.1%, 6.0%, and 8.0%, respectively. Therefore, sustainable production goals of increasing grain yield and reducing GHG emissions were achieved with N reduction/replacement using U + OM and low irrigation input of 60 mm.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 3","pages":"Pages 126-136"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49732750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Progress and challenges of rice ratooning technology in Hunan Province, China 湖南省水稻再生产技术的进展与挑战

Crop and Environment Pub Date : 2023-09-01 DOI: 10.1016/j.crope.2023.05.002

Weiqin Wang, Huabin Zheng, Yuanwei Chen, Dan Zou, Youyi Luo, Qiyuan Tang

{"title":"Progress and challenges of rice ratooning technology in Hunan Province, China","authors":"Weiqin Wang, Huabin Zheng, Yuanwei Chen, Dan Zou, Youyi Luo, Qiyuan Tang","doi":"10.1016/j.crope.2023.05.002","DOIUrl":"https://doi.org/10.1016/j.crope.2023.05.002","url":null,"abstract":"<div><p>As the largest rice production province in China, the ratoon rice in Hunan has rapidly developed in recent years in the aspects of planting area, total production, and cultivation technologies. The present review is undertaken to summarize the past and current status and the key practices of ratoon rice production in Hunan. The planting area of ratoon rice in Hunan was 267,000 ha in 2019, with the average yield of 7.50–10.50 t ha<sup>−1</sup> and 2.30–6.00 t ha<sup>−1</sup> in the main and ratoon seasons, respectively. The grain quality in ratoon season is similar to or even better than that of late-season rice, but the relatively poor grain quality in the main season limits the profits for farmers. In recent years, research on the cultivation technology of ratoon rice has been widely conducted in Hunan, which led to the development of a series of key practices for ratoon rice production with regard to variety selection, sowing dates, crop establishment, fertilizer and water management, straw cutting height and harvesting time, and the controls of pests, diseases, and abiotic stresses. However, the constraints in policy intervention, as well as the large yield gap, have greatly limited the further expansion of ratoon rice in Hunan. To further promote ratoon rice production in Hunan, the innovation and extension of fully mechanized ratoon rice cultivation technologies, breeding and chemical regulation approaches to enhance ratooning ability, and support from the local government regarding policy, infrastructure, demonstration, and training must be strengthened in the future.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 3","pages":"Pages 101-110"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Progress and challenges of rice ratooning technology in Chongqing Municipality, China 重庆市水稻再生产技术进展与挑战

Crop and Environment Pub Date : 2023-09-01 DOI: 10.1016/j.crope.2023.05.003

Wujun Zhang , Xiujian Duan , Xiong Yao , Qiangming Liu , Renpeng Xiao , Xianwei Zhang , Xia Luo , Yongqun Tang , Yanjie Yao , Jingyong Li

{"title":"Progress and challenges of rice ratooning technology in Chongqing Municipality, China","authors":"Wujun Zhang , Xiujian Duan , Xiong Yao , Qiangming Liu , Renpeng Xiao , Xianwei Zhang , Xia Luo , Yongqun Tang , Yanjie Yao , Jingyong Li","doi":"10.1016/j.crope.2023.05.003","DOIUrl":"https://doi.org/10.1016/j.crope.2023.05.003","url":null,"abstract":"<div><p>Ratoon rice, the production of second crop from the dormant buds on the stubble after harvesting of the main crop, is considered an economic, environment-sound, and resource-efficient cropping system. This paper summarized the research progress of ratoon rice in Chongqing Municipality, the upper reaches of the Yangtze River, China in the past 30 years, and analyzed the physiological mechanisms behind the rice varieties with strong ratooning ability and the key practices for achieving high yield of ratoon rice. Ratooning ability and grain yield of the ratoon crop are highly and positively correlated with the initiation and growth of axillary buds, which can be promoted by optimizing variety selection, nutrient and water management, crop establishment method, stubble height, and harvesting method of the main crop. With implementation of those key practices, the grain yield could reach as high as 7.2 t ha<sup>−1</sup> of the ratoon crop with the main crop harvested manually. Due to the shortage of rural labor, mechanical harvesting of the main crop becomes an inevitable option for the sustainable development of ratoon rice. In the future studies, there is need to develop specialized harvesting machines and crop management strategies for reducing the rolling damage to stubbles during mechanical harvesting of the main crop, and consequently achieving high and stable yield of mechanized ratoon rice.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 3","pages":"Pages 137-146"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of high night temperature on leaf senescence, physiological activity, and growth in soybean 夜间高温对大豆叶片衰老、生理活性和生长的影响

Crop and Environment Pub Date : 2023-08-11 DOI: 10.1016/j.crope.2023.08.001

Taiyu Lin, Yang Lu, Yuki Okamoto, Tatsuhiko Shiraiwa

{"title":"Effect of high night temperature on leaf senescence, physiological activity, and growth in soybean","authors":"Taiyu Lin, Yang Lu, Yuki Okamoto, Tatsuhiko Shiraiwa","doi":"10.1016/j.crope.2023.08.001","DOIUrl":"10.1016/j.crope.2023.08.001","url":null,"abstract":"<div><p>Physiological processes that cause a negative growth response to high night temperatures (HNTs) were investigated in soybean. An HNT (28°C) was established in a phytotron during the first (HL) and second (LH) halves of the reproductive stage and the entire (HH) reproductive stage, along with a continuously low (LL) night temperature (22°C). Plant biomass was lower in HH than that in LL, whereas the harvest index was relatively stable. N accumulation in the plants tended to decline with HNT. The leaf area and leaf N concentration tended to be lower in HL and HH than in LL, suggesting an earlier onset of leaf senescence under HNT in the early reproductive stage. The light-saturated leaf photosynthetic rate was lower in HH than in LL during the late reproductive stage, associated with a low stomatal conductance and leaf photosynthetic rate per intercellular CO<sub>2</sub> concentration. A slower rise in the leaf photosynthetic rate in the morning occurred likely because of the HNT, coinciding with the low leaf water potential at predawn and low leaf photosynthetic rate to intercellular CO<sub>2</sub> concentration ratio. A moderately increasing gradient of night temperature from 21.7 to 23.9°C was created in a mini-field in another experiment using a temperature gradient chamber, and in this experiment, crop growth and N dynamics were similar to those obtained in the phytotron study. These results suggest that the biomass growth of soybean is affected by HNT, particularly during the early reproductive stage.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 4","pages":"Pages 184-191"},"PeriodicalIF":0.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773126X23000539/pdfft?md5=1a668bc0b05896defe3aa7260b66d4d5&pid=1-s2.0-S2773126X23000539-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77670819","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

Agriculture in silico: Perspectives on radiative transfer optimization using vegetation modeling 计算机农业:利用植被模型对辐射转移优化的展望

Crop and Environment Pub Date : 2023-07-18 DOI: 10.1016/j.crope.2023.07.003

Yujie Wang, Yi Yin

{"title":"Agriculture in silico: Perspectives on radiative transfer optimization using vegetation modeling","authors":"Yujie Wang, Yi Yin","doi":"10.1016/j.crope.2023.07.003","DOIUrl":"https://doi.org/10.1016/j.crope.2023.07.003","url":null,"abstract":"<div><p>Advancing crop yield within limited agricultural land use is crucial to alleviate potential food shortages from the increasing world population. While genetic breeding holds great potential in improving crop yield, real-world practices are often constrained by the limitations of scaling the laboratory findings with respect to coupled environmental feedback and limited tools to project the optimal strategies based on environment and crop traits such as crop density management. Aided by a process- and trait-based vegetation model, we review and theoretically evaluate approaches that aim to improve crop yield through canopy radiative transfer optimization. The evaluated approaches include trait breeding (e.g. leaf color and chlorophyll action spectrum), canopy structure (e.g. canopy density and spacing), and environment manipulation (e.g. supplemental radiation intensity and source). We prototype vegetation modeling applications that can theoretically explore the potentials of a number of approaches at various setups that otherwise require tremendous effort in the real world, and propose to use vegetation modeling to guide more efficient agricultural practices. Future elaborations in vegetation modeling with respect to more physiological representations of vegetation processes, quantification of maintenance costs, and utilization of remote sensing data would further advance the utilization of modeling in agriculture.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 4","pages":"Pages 175-183"},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49732198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smallholder maize yield estimation using satellite data and machine learning in Ethiopia 埃塞俄比亚利用卫星数据和机器学习估算小农玉米产量

Crop and Environment Pub Date : 2023-07-07 DOI: 10.1016/j.crope.2023.07.002

Zhe Guo , Jordan Chamberlin , Liangzhi You

{"title":"Smallholder maize yield estimation using satellite data and machine learning in Ethiopia","authors":"Zhe Guo , Jordan Chamberlin , Liangzhi You","doi":"10.1016/j.crope.2023.07.002","DOIUrl":"https://doi.org/10.1016/j.crope.2023.07.002","url":null,"abstract":"<div><p>The lack of timely, high-resolution data on agricultural production is a major challenge in developing countries where such information can guide the allocation of scarce resources for food security, agricultural investment, and other objectives. While much research has suggested that remote sensing can potentially help to address these gaps, few studies have indicated the immediate potential for large-scale estimations over both time and space. In this study we described a machine learning approach to estimate smallholder maize yield in Ethiopia, using well-measured and broadly distributed ground truth data and freely available spatiotemporal covariates from remote sensing. A neural networks model outperforms other algorithms in our study. Importantly, our work indicates that a model developed and calibrated on a previous year's data can be used to reasonably estimate maize yield in the subsequent year. Our study suggests the feasibility of developing national programs for the routine generation of broad-scale, high-resolution estimates of smallholder maize yield, including seasonal forecasts, on the basis of machine learning algorithms and well-measured ground control data and currently existing time series satellite data.</p></div>","PeriodicalId":100340,"journal":{"name":"Crop and Environment","volume":"2 4","pages":"Pages 165-174"},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49732206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2