小麦条锈病胁迫下冬小麦品种天选57号产量方程的构建
Construction of Yield Equation of Winter Wheat Variety Tianxuan 57 under Wheat Stripe Rust Stress
谢晓丽 1孙振宇 1黄瑾 1张勃 1李培玲 1金社林1
作者信息
- 1. 甘肃省农业科学院植物保护研究所,甘肃 兰州 730070
- 折叠
摘要
小麦条锈病一直以来都是小麦植保工作的重中之重,进一步明确小麦条锈病在甘肃陇南地区发病程度与冬小麦产量之间的相关性,为制定天水地区小麦条锈病防控指标提供科学依据.选取当地主栽冬小麦品种天选 57 号为研究对象,在人工接种诱发后,通过田间喷施 20%三唑酮乳油 135 g/hm2 兑水 450 kg防控 1～2 次,并造成一定的病情梯度,实地调查田间病情并测产,得到冬小麦品种天选 57 号的小麦条锈病最终病情(x)与平均折合产量(y产量)间的回归方程为:y 产量=-8.5714x2-488.57x+7 512(R2=0.987 2).同时通过理论折合产量计算出冬小麦品种天选 57 号使用 20%三唑酮乳油防控 1 次时,产量损失率为 20.13%～29.71%,挽回产量损失 4.79～14.37 个百分点.防控 2 次时产量损失率为 7.35%～12.14%,挽回产量损失为 22.36～27.15 个百分点.得到冬小麦品种天选57号采用 20%三唑酮乳油防控 1次和防控 2 次后的植保贡献率分别为 6.82%～18.00%、25.45%～29.31%.
Abstract
Wheat stripe rust has always been a critical focus of wheat plant protection.In order to further clarify the correlation between the severity of wheat stripe rust in Longnan,Gansu,and winter wheat yield so as to provide scientific reference for setting control standards for wheat stripe rust in the Tianshui area,the local main winter wheat variety Tianxuan 57 was selected as the research object.After artificial induced inoculation,the disease gradient was caused by 1 to 2 times of spraying of 20% triadimefon emulsifiable concentrate at 135 g/ha mixed with 450 kg of water,and the field disease was investigated and measured after delivery.The regression equation between wheat stripe rust disease index(x)and yield(y1)of winter wheat variety Tianxuan 57 was obtained.The regression equation was y1=-8.571 4x2-488.57x+7512(R2=0.987 2).The theoretical yield calculation showed that when Tianxuan 57 was treated with 20% triadimefon emulsifiable concentrate for 1 time,the yield loss rate ranged from 20.13% to 29.71%,recovering 4.79 to 14.37 percentage points of yield loss.When treated with 2 times,the yield loss rate ranged from 7.35% to 12.14%,recovering 22.36 to 27.15 percentage points of yield loss.The calculation results showed that the contribution rate of plant protection for 1 time and 2 time application of 20% triadimefon emulsifiable concentrate were 6.82 to 18.00% and 25.45% to 29.31%,respectively.
关键词
小麦条锈病/冬小麦/品种/天选57号/产量回归方程/产量损失率/植保贡献率Key words
Wheat stripe rust/Winter wheat/Variety/Tianxuan 57/Yield regression equation/Yield loss rate/Contribution rate of plant protection引用本文复制引用
基金项目
"十四五"国家重点研发计划(2021YFD1401005)
国家自然科学基金(31160498)
出版年
2024
国家科技期刊平台
NSTL
万方数据