The results show that the early, stronger and tidy seedlings can be obtained by sowing in early spring so as to increase the hybrid yield because of overcoming the spring drought and avoiding the summer drought and the increase range is about 30.8%.
结果表明:采取早春播种的保护性栽培,可以获得早苗、壮苗、齐苗,克服春旱,避开伏旱,具有明显的增产效果,一般增幅为30.8%。
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