不同栽培模式对双季超级稻产量及氮素吸收的影响

以超级早稻春光1号和超级晚稻淦鑫688为材料,采用抛秧方式,研究了不同栽培模式对其产量及氮素吸收的影响。结果表明,早晚稻的产量均以三高一保栽培模式和精确定量栽培模式>三控栽培模式>常规栽培模式。三高一保栽培模式的有效穗数、成穗率、结实率和千粒重均较高,而精确定量栽培模式的有效穗数最高,但成穗率较低。与常规栽培模式相比,精确定量模式、三高一保模式和三控栽培模式可提高双季超级稻的生物产量、氮素积累总量和氮素利用率。三高一保栽培模式明显降低了生产100 kg籽粒的需氮量。

Effects of Different Cultivation Modes on Yield and Nitrogen Absorption of Double Cropping Super Rice

Using super early rice variety Chunguang No.1 and super late rice variety Ganxin 688 as experimental materials,the author studied the effects of different cultivation modes on the yield and nitrogen absorption of rice,which was transplanted by seedling-throwing mode.The results showed that the yield of both early rice and late rice cultivated by different modes had the following order: precise and quantitative cultivation mode(PQCM) and three-high and one-guarantee cultivation mode(THOGCM) > three-control cultivation mode(TCCM) > conventional cultivation mode(CCM).The number of effective spike,ear-bearing percentage,setting rate and 1000-grain weight of rice in treatment THOGCM were higher.The effective spike number of rice in treatment PQCM was maximum,but its ear-bearing percentage was lower.In comparison with CCM,the PQCM,THOGCM and TCCM could enhance the biomass,total nitrogen accumulation and nitrogen utilization rate of double cropping super rice,and THOGCM obviously reduced the nitrogen requirement for 100 kg grain production.