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杂交高粱产量高,但不易捉全苗,原因何在?怎样保全苗?我们于1971—1978年对这些问题进行了试验研究和调查研究,现将主要结果综述如下。杂交高粱(3197A做母本的杂交种)的出苗率低于普通高粱。遗太杂5号(3197A×红5)比盘陀高粱出苗率低16%左右。其原因是杂交种(以3197A作母本的)的种子芽稍短,顶土能力差;种子含水分大,发芽阶段长势弱。据试验:遗太杂5号,室内发芽率为90%,田间出苗率仅65%;室内发芽率67%者,田间出苗率仅39%。因此,播种杂交高粱须适当增加播种量。室内发
The high yield of hybrid sorghum, but not easy to catch the whole seedlings, the reason? How to protect seedlings? We conducted in 1971-1978 these issues were studied and investigated, the main results are summarized below. The emergence rate of hybrid sorghum (3197A maternal hybrid) was lower than that of ordinary sorghum. Yu Tai miscellaneous 5 (3197A × red 5) than the tray Tuo sorghum emergence rate of about 16% lower. The reason is that hybrid seeds (3197A as the female parent) of the seed sprouts slightly shorter, top soil ability is poor; seeds contain large water, germination stage growth is weak. According to the test: No. 5 in Jijuzao, indoor germination rate of 90%, field emergence rate of only 65%; indoor germination rate of 67%, field emergence rate of only 39%. Therefore, sowing hybrid sorghum should be appropriate to increase seeding. Indoor hair