不同施肥水平对杂交水稻产量构成要素及其稳定性的影响

Effects of Different Fertilizer Application Rates for Hybrid Rice on Yield Components and Its Stability

采用3种不同施肥量和2个杂交水稻品种进行连续2年的大田定位试验,分析水稻产量构成要素、产量及干物质的生产特点。结果表明:粤优589分蘖数、有效穗数、结实率和红泰优996分蘖数、有效穗数在年际间差异极显著;粤优589在中肥水平产量最高,红泰优996在高肥水平最高;粤优589分蘖数、有效穗、结实率、粒重和红泰优996分蘖数、有效穗、每穗粒数与收割产量之间存在着正相关系,粤优589每穗粒数与收割产量存在一定的负相关系,红泰优996结实率、粒重与收割产量的正负相关性均不显著;粤优589抽穗期、成熟期的总干物质与收割产量存在负相关系,红泰优996抽穗期、成熟期的总干物质生产量与收割产量存在正相关系。2个杂交水稻年际间产量波动较小,具有一定的稳产性;不同施肥量水稻产量差异不显著;粤优589以中等施肥量为宜,红泰优996高施肥量为宜。

The effects of three fertilizer application rates of two Hybrid rice varieties on yield and its components were studied in rice field experimental station in Danzhou from 2013 to 2014. The results showed that tiller and effective panicle number had positive correlation with the yield for Yueyou 589, the effective panicle number and seed setting rate had positive correlation with the yield for Hongtaiyou 996, however, the spikes per panicle had negative correlation with the yield for both varieties. It had not significant differences of yield of hybrid rice under three fertilizer application rates. With increasing of fertilization application, it had an increasing trend for yield of Hongtaiyou 996, but Yueyou 589 had the highest yield in middle fertilizer application rate. It did not find that the yield of two hybrid rice had not significant difference between the two years.