氮钾肥互作对杂交稻产量和辐射利用效率的影响
Effects of Nitrogen and Potassium Fertilizer Interaction on Yield and Radiation Use Efficiency of Hybrid Rice
熊昕 1邓俊 1尚李岩 1盛添 1叶佳雨 1刘子琛 1黄礼英 2张运波2
作者信息
- 1. 农业农村部长江中游作物绿色高效生产重点实验室(部省共建)/长江大学农学院,434025,湖北荆州
- 2. 农业农村部长江中游作物绿色高效生产重点实验室(部省共建)/长江大学农学院,434025,湖北荆州;湿地生态与农业利用教育部工程研究中心/长江大学农学院,434025,湖北荆州
- 折叠
摘要
以籼型杂交稻(Y两优900和荃优华占)为供试材料,设置90(N1)、120(N2)和180(N3)kg/hm23个氮肥量和120(K1)、160(K2)和210(K3)kg/hm2 3个钾肥量处理,研究氮钾肥互作对杂交稻产量、干物质积累和辐射利用效率的影响.结果表明,氮钾肥互作效应显著,Y两优900和荃优华占在N2K3和N3K3处理下产量最高,分别达到9.33和9.66t/hm2.分析产量构成发现,在低氮水平下,增施钾肥对结实率影响显著,其中K2较K1处理提高了 3.2％,而K3较K1处理提高了 5.6％;在中氮和高氮水平下,增施钾肥对每穗颖花数和结实率均有显著影响.此外,增施钾肥提高了2个品种的干物质积累量、冠层光截获率、拦截辐射量和辐射利用效率,相关分析表明,以上指标均与产量呈显著正相关.因此,适量增钾减氮栽培有利于改善杂交稻的光合辐射利用率,从而增加干物质积累量,进而提高结实率和产量.
Abstract
Field experiments with two hybrid rice variety(Y-Liangyou 900 and Quanyouhuazhan),three N applications(90,120 and 180 kg N/ha)and three K applications(120,160 and 210 kg K/ha)were conducted in clarify the effects of nitrogen(N)and potassium(K)fertilizer interaction on grain yield,dry matter accumulation and radiation use efficiency of hybrid rice.The main results showed that the grain yields were significantly affected by N and K fertilizer interaction effects.The highest yield of Y-Liangyou 900 and Quanyouhuazhan were achieved under N2K3 and N3K3 treatments,which were 9.33 and 9.66 t/ha,respectively.Analysis of yield components showed that under low nitrogen level,the effects of increased K fertilizer on seed-setting rate was significant,in which K2 increased by 3.2％compared with K1 treatment,K3 increased by 5.6％compared with K1 treatment.The number of spikelets per panicle and seed-setting rate were significantly improved by increasing K fertilizer application at medium and high N levels.In addition,increasing K fertilizer improved dry matter accumulation,canopy light interception percentage(IP),intercepted photosynthetically active radiation(IPAR)and radiation use efficiency(RUE)of Y-Liangyou 900 and Quanyouhuazhan,and correlation analysis showed that IP,IP AR and RUE were positively correlated with yield.Therefore,moderate increasing K with reduced N fertilizer application could improve RUE,increase dry matter accumulation,and then increase seed-setting rate and yield of hybrid rice.
关键词
杂交稻/产量/氮肥/钾肥/辐射利用率Key words
Hybrid Rice/Yield/Nitrogen fertilizer/Potassium fertilizer/Radiation use efficiency引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据