杂交水稻强化栽培措施的增产效应研究

Study on the Increasing Production Domino Effect of Hybrid Rice by Different Measures under the System of Rice Intensification (SRI)

研究了杂交水稻组合、施氮水平、栽植密度和栽植方式等因素在强化栽培体系下的增产效应．并对强化栽培技术的改良进行探讨,提出了重庆地区水稻强化栽培超高产技术措施。各因子水平的最佳组合为A_1B_2C_xD_2,即选用穗重型杂交水稻新组合,每hm^2施纯氮195kg,栽13．5万窝或18万窝,采取大三围栽植,可以有效地提高单产水平。

Study on different kinds of heavy type of combinations,the fertilization level of“N”,and planting with different densities and cultural models,explores that the optimization combination is A_1B_2C_xD_2 of each factor level.The accidence puts forward the technique rules of the cultivation under the System of Rice Intensification(SRI)in Chongqing area:choosing a heavy-spike-type hybrid rice;N rate,N 195 kg/hm^2;planting density,135 000 or 180 000 hills/hm^2.