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适时、适量使用好“九二○”,是夺取70优双九制种高产的关键。试验结果表明:70优双九制种产量达3 000 kg/hm2时,“九二○”的用量一般为父本喷75~90 g/hm2,母本喷150~180 g/hm2,总用量控制在240 g/hm2左右为宜。
Timely, appropriate use of good “920”, is to seize 70 gifted Shuangjiu high-yielding key. The results showed that the yield of “920” was 75-90 g / hm2 for the male parent and 150-180 g / hm2 for the female parent when the yield of “70” double-shrub seed production was 3 000 kg / hm2. Control at about 240 g / hm2 is appropriate.