Controlling the lodging risk of rice based on a plant height dynamic model.

IF 3.4 3区 生物学 Q1 Agricultural and Biological Sciences
Dong-Hong Wu, Chung-Tse Chen, Ming-Der Yang, Yi-Chien Wu, Chia-Yu Lin, Ming-Hsin Lai, Chin-Ying Yang
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引用次数: 2

Abstract

Background: Rice is a key global food crop. Rice lodging causes a reduction in plant height and crop yield, and rice is prone to lodging in the late growth stage because of panicle initiation. We used two water irrigation modes and four fertilizer application intervals to investigate the relationship between lodging and various cultivation conditions over 2 years.

Results: Plant height data were collected and combined with aerial images, revealing that rice lodging was closely related to the nitrogen fertilizer content. The aerial images demonstrated that lodging mainly occurred in the fields treated with a high-nitrogen fertilizer, and analysis of variance revealed that plant height was signifi-cantly affected by nitrogen fertilizer. These results demonstrated that rice plant height in the booting stage was significantly positively correlated with the lodging results (r = 0.67) and nega-tively correlated with yield (r = - 0.46). If the rice plant height in the booting stage exceeded 70.7 cm and nitrogen fertilizer was continuously applied, according to the predicted growing curve of plant height, the plant would be at risk of lodging. Results showed more rainfall accumulated in the later stage of rice growth accompanied by strong instantaneous gusts, the risk of lodging in-creased.

Conclusion: The results provide predictions that can be applied in intelligent production and lodging risk management, and they form the basis of cultivation management and response policies for each growth period.

Abstract Image

Abstract Image

Abstract Image

基于株高动态模型的水稻倒伏风险控制。
背景:水稻是全球重要的粮食作物。水稻倒伏导致植株高度降低和产量降低,水稻在生育后期因穗形成而易发生倒伏。采用2种灌溉方式和4个施肥间隔,研究了2年不同栽培条件对倒伏的影响。结果:收集到的水稻株高数据与航拍影像相结合,发现水稻倒伏与氮肥含量密切相关。航空影像显示,倒伏主要发生在高氮肥处理的田地,方差分析显示氮肥对株高有显著影响。结果表明,孕穗期水稻株高与倒伏结果呈显著正相关(r = 0.67),与产量呈显著负相关(r = - 0.46)。如果孕穗期水稻株高超过70.7 cm,连续施氮肥,根据株高预测生长曲线,植株有倒伏危险。结果表明:水稻生长后期雨量积累较多,瞬时阵风强,倒伏风险增大;结论:研究结果为智能生产和倒伏风险管理提供了预测依据,并为各生育期的栽培管理和应对政策提供了依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Botanical Studies
Botanical Studies 生物-植物科学
CiteScore
5.50
自引率
2.90%
发文量
32
审稿时长
2.4 months
期刊介绍: Botanical Studies is an open access journal that encompasses all aspects of botany, including but not limited to taxonomy, morphology, development, genetics, evolution, reproduction, systematics, and biodiversity of all plant groups, algae, and fungi. The journal is affiliated with the Institute of Plant and Microbial Biology, Academia Sinica, Taiwan.
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