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种菜盖地膜.早熟又增产。这个效益已被广大菜农所接受。因此,近几年来地膜覆盖的面积逐年扩大,覆盖的蔬菜种类也在增多,每亩产量增加的幅度由5%到了5%不等。增产幅度的大小虽与蔬菜的种类有关,但与盖膜后的条件也大有关系。有时虽然盖了地膜,可是增产效果很不明显,甚至会欠收。或者,盖地膜后早期产量较高,后期产量不高,总产量并未增加。好的结果应该是既早熟又丰产。为什么不能增产,或只早熟不增产呢?这不外乎两个条
Cover vegetable film. Premature and increase production. This benefit has been accepted by the majority of vegetable growers. Therefore, in recent years, the area covered by plastic mulching has been expanded year by year, and the types of vegetables covered by it have also increased. The yield increase per mu has been varying from 5% to 5%. Although the size of the rate of increase with the type of vegetables, but with the conditions after the film is also greatly related. Although sometimes covered in plastic film, but the yield is not obvious, or even owe. Or, after the film mulching early high yield, late yield is not high, the total output did not increase. Good results should be both early and high yield. Why can not increase production, or only precocious does not increase production? This is nothing more than two articles