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根据单穗结实率的高低,将籼型两用系1103S春繁群体内的穗子分为3类:A类穗结实率<100%,B类穗结实率>101%,但<300%,C类穗结率>301%。A类穗比例大小与群体平均结实率及春繁产量高低呈极显著负相关;而C类穗比例大小与后两者呈极显著正相关。在泸州,将1103S温度敏感期安排在5月中下旬,是提高C类穗比例的关键。在此基础上采取增大种植密度,始穗期喷施30g/hm2GA3等措施,能显著增加春繁产量。
According to the rate of single ear seed setting, the ears of 1103S spring group were divided into three categories: the rate of seed set of A was <100%, the rate of seed set of B was> 101%, but <30 0%, C-type ear rate> 30 1%. There was a significant negative correlation between the proportion of panicles in group A and the average seed setting rate and the yield per plant in spring. However, the percentage of panicle C in panicles was significantly and positively correlated with the latter two. In Luzhou, the 1103S temperature-sensitive period arranged in late May, is to improve the proportion of C-type key. On this basis, measures such as increasing planting density and spraying 30g / hm2GA3 at the beginning of heading stage could significantly increase the yield of spring reproduction.