农业机械学报2024，Vol.55Issue(7)：373-385,13.DOI:10.6041/j.issn.1000-1298.2024.07.037
农田水位与施氮对拔节孕穗期受涝后冬小麦的调控效应
Regulation Effects of Farmland Water Level and Nitrogen Application on Winter Wheat after Waterlogging at Jointing and Booting Stage
摘要
Abstract
The planting experiment was conducted from 2020 to 2021 in the lysimeters at Jiangning District of Nanjing City to investigate the effects of farmland water level and nitrogen fertilization regulations on winter wheat growth,yield,grain quality,water and nitrogen utilization,nitrogen and phosphorus load after the winter wheat suffered from waterlogging during the jointing and booting stage.Winter wheat variety"Yangmai 25"was chosen as the experimental material,after the winter wheat suffered from waterlogging during the jointing and booting stage,three high,middle and low farmland water level(the farmland water level down to-40 cm,-60 cm,-80 cm in 3 days after the 1 day waterlogging)and three low,middle and high nitrogen application rates(160 kg/hm2,190 kg/hm2,220 kg/hm2),as well as a control group with non-waterlogging and the nitrogen of 190 kg/hm2 were set in the experiment.The results indicated that the winter wheat plant height,aboveground dry matter,yield,water use efficiency,grain crude protein content and grain lysine content were gradually increased with the decrease of farmland water level and nitrogen application rate.Partial factor productivity of nitrogen was increased gradually with the decrease of farmland water level,while decreased with the increase of nitrogen application rate.The total nitrogen,total phosphorus,and other pollutant loads were increased gradually with the decrease of farmland water level.Compared with the control treatment,the increase of nitrogen fertilizer(220 kg/hm2)could alleviate the effect of waterlogging stress,and promote the increase of winter wheat aboveground dry matter and yield by 4.76%～23.81%and 2.75%～9.19%,respectively.The reduction of nitrogen fertilizer(160 kg/hm2)made the winter wheat yield at the medium and high farmland water level decreased by 2.20%and 14.00%,respectively,and the corresponding water use efficiency was decreased by 4.55%and 9.74%,respectively.The low farmland water level could decrease the yield reduction effect due to the nitrogen reduction,which increased the yield and nitrogen partial factor productivity of winter wheat by 3.98%and 23.49%,respectively.The higher the farmland water level was,the greater the comprehensive waterlogging degree during the water control period was,and the lower the yield was.In addition,short-term waterlogging had a positive effect on increasing the crude protein content of grains,as the crude protein contentof each treatment was increased by 11.50%～20.21%compared with that of the control treatment.Aiming at high yield,high efficiency,pollution reduction and quality improvement,it was recommended that the farmland water level should be lowered to-80 cm in 3 days after the winter wheat suffered from waterlogging with 5 cm water layer for 1day at winter wheat jointing and booting stage,and the nitrogen application rate should be 220 kg/hm2.The research results can provide a theoretical basis for the winter wheat planting and waterlogging disasters restoration in southern China and similar waterlogging-prone agricultural areas.关键词
冬小麦品质/涝渍胁迫/农田水位/排水/面源污染/调控效应Key words
winter wheat quality/waterlogging stress/farmland water level/drainage/non-point source pollution/regulating effects分类
农业科技引用本文复制引用
何平如,俞双恩,丁继辉,马韬,戴妍,李金刚..农田水位与施氮对拔节孕穗期受涝后冬小麦的调控效应[J].农业机械学报,2024,55(7):373-385,13.基金项目
国家自然科学基金项目(51879074、52309046、52109051)、中央高校基本科研业务费专项资金项目(B230201053)和江苏省水利科技项目(2021062、2020048) （51879074、52309046、52109051）
