机插秧每穴栽插苗数对水稻分蘖与成穗的影响

Effects of different quantities of planting seedlings per hill on outgrowth and tiller production for machine-transplanted rice

以水稻晚粳品种武香粳9号为材料,通过对分蘖跟踪挂牌,研究了机插水稻分蘖发生和成穗的特点,并与手栽处理分蘖进行比较。试验结果表明,机插水稻分蘖发生和成穗主要集中在0/4、0/5、0/6、0/7的一级分蘖和4/1低蘖位二级分蘖;随着栽插密度增加,0/4、0/5、0/6、0/7的一级分蘖的发生率均下降,4/1等低位的二级分蘖发生率下降更多,最终成穗率也下降。研究还表明机栽3苗时产量最高,与手栽处理相比,0/5、0/6、0/7的一级分蘖的发生与成穗率及最终产量均高于手栽处理。该文揭示了机插水稻分蘖发生和成穗规律。

The effects of plant density on outgrowth and productive tillers by machine-transplanted rice were studied with Wuxiangjing 9（japonica variety） from labeling on tiller, and outgrowth and tiller production by machine-transplanted rice with planting rice by hand were compared. Results showed that the outgrowth and tiller production for mechanized rice transplanting emphasis mostly 0/4, 0/5, 0/6, 0/7, the first tiller and 4/1 the second tiller and the more range tiller, and on the condition of machine-transplanted rice. With plant density increase, 0/4, 0/5, 0/6, 0/7 of the first tiller prominently reduce. The lower second tiller as 4/1 mostly reduces. Results indicated the yield as three seedlings per hill for mechanized rice transplanting is the highest, 0/5, 0/6, 0/7 of the first tiller outgrowth and tiller production rate are higher than those by hand. The experiment indicates the law of the outgrowth and tiller production for machine-transplanted rice.