干旱地区农业研究2017，Vol.35Issue(6)：39-45,7.DOI:10.7606/j.issn.1000-7601.2017.06.06
灌水频次对化学封顶棉花生长发育的影响研究
Effect of irrigation frequency on the growth and development of chemical topping cotton
摘要
Abstract
The influence of four irrigation frequencies on dry matter accumulation,nitrogen absorption&utilization and agronomic traits of cotton with chemical and manual topping treatment were compared and analyzed.Xinluzao No.57 was used as the test material with four irrigation frequencies(6 times,8 times,10 times and 12 times)adopted in main plot(split-plot test design)and chemical&manual topping treatment adopted in secondary plot.The results showed that there was a positive correlation between irrigation frequency and yield,and the rapid accumulation of dry matter was pro-longed with the increase of frequency of irrigation,extending for up to 18d.Under different irrigation frequency,the pe-riod that chemical topping cotton's rapid accumulation of dry matter was 1~5 d longer than the artificial topping cotton, showing that increasing the irrigation frequency and chemical capping both prolonged the rapid accumulation period of dry matter,increased the accumulation of dry matter and the amount of nitrogen uptake.Under different irrigation frequency, the abscission rate of chemical topping cotton buds and bolls was 2.47% ~9.21% higher than artificial topping cotton. Under chemical topping and artificial topping,the changes of single boll weight were 0.06~0.49 g and 0~0.28 g re-spectively,and the changes of seed index were 0.19~1.67 g and 0.11~0.81 g.These indicate that chemical topping cotton plants are more sensitive to water and fertilizer,and that chemical topping can prolong the growth period of cotton plants to make cottonseed more full and have high quality breeding potential.关键词
棉花/化学封顶剂/灌水频次/干物质积累/氮素吸收/蕾铃脱落/农艺性状Key words
cotton/chemical detopping/irrigation frequencies/dry matter accumulation/nitrogen uptake/boll re-tention abccission rate/agronomic character分类
农业科技引用本文复制引用
聂志勇,康正华,崔月,贾喜宁,赵强..灌水频次对化学封顶棉花生长发育的影响研究[J].干旱地区农业研究,2017,35(6):39-45,7.基金项目
国家自然科学基金(3156100654) （3156100654）
