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针对黑龙江省春旱和热量不足的问题,于1984～1985年开展了蓖麻地膜覆盖栽培试验,其结果如下: 覆膜增产显著 试验设覆膜分别宽70、50、30厘米3种,以不覆膜为对照。在嫩江农科所、平安基点和林甸进行。各点试验产量及产值结果表
Aiming at the problem of spring drought and lack of heat in Heilongjiang Province, castration experiment was conducted in 1984-1985. The results are as follows: Film as a control. In the Nenjiang Agricultural Institute, Ping Anji and Lindian carried out. Each point of test output and output results table