福建农业学报2016，Vol.31Issue(7)：699-703,5.DOI:10.19303/j.issn.1008-0384.2016.07.006
不同氮钾施用量对再生稻产量及其构成因素的影响
Effects of Different Nitrogen and Potassium Application Levels on Yield and Its Components of Ratoon Rice
摘要
Abstract
The effects of different nitrogen (N)and potassium (K)application levels on yield and its components of ratoon rice were studied using a two-line hybrid rice combination Guangliangyou 676. The results indicated that N and K application levels of obtaining the highest yield in the first crop were 23.27 g · m-2 and 22.99 g · m-2 respectively,and reached the yield of 1 1 52.9 g·m-2 and 1 1 59.0 g·m-2 respectively. N and K application levels of achieving the best economic benefit in the first crop were 21.86 g · m-2 and 1 9.54 g m-2 respectively. N application level of obtaining the highest yield and the best economic benefit in the second crop was 20.48 g·m-2 and 18.42 g·m-2 respectively. These results showed that ratoon rice was more sensitive to nitrogen,and the lack of nitrogen would reduce more yield than that of potassium. Moreover,in the first crop,the number of effective panicle and plant height both increased with the increase of N and K application levels,the exhibited a bell-shaped curve correlation with N application level and a linear correlation with potassium application level. The seed setting rate decreased with the increase of N application level in the first crop. With the increase of nitrogen application level of promoting axillary buds in the second crop,the number of effective panicle significantly increased and the spikelets per panicle appeared a trend of first increasing and then reduction. Under the high nitrogen application level in the second crop,the seed setting rate slightly reduced and the difference of 1 000-grain weight was less.关键词
再生稻/施氮钾量/产量/产量因素Key words
ratoon rice/N and K application level/yield/yield components分类
农业科技引用本文复制引用
何花榕,房贤涛,谢祖钦,张居念,卓传营,蔡光璟,杨惠杰..不同氮钾施用量对再生稻产量及其构成因素的影响[J].福建农业学报,2016,31(7):699-703,5.基金项目
福建省科技计划项目---省属公益类科研院所基本科研专项(2014R1021-3、2014R1021-10) （2014R1021-3、2014R1021-10）
福建省科技重大专项(2013NZ0002-2) （2013NZ0002-2）
福建省财政专项---福建省农业科学院科技创新团队建设项目(CXTD-2-1312) （CXTD-2-1312）
