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磷是作物营养三要素之一。只有满足作物对它的需要,才能实现稳产高产。 磷素的来源主要有两方面:一是靠施肥,二是靠土壤供给。新疆农用土壤的全磷含量较丰富,一般在0.15—0.25之间。但有效磷含量很低(在5PPm以下竟达70％),表明土壤供磷能力很弱。且目前新疆有机肥和化肥严重不足,白地播种的现象尚到处可见。在这种情况下,若能加速土壤中的非有效磷转化为有效磷,则既能满足作物对磷素养分的需要,又能降低生产成本,提高经济效益。种植绿肥正是实现上述目的的一种有力措施。
Phosphorus is one of the three elements of crop nutrition. Only by meeting the crop’s needs for it can a steady and high yield be achieved. The main sources of phosphorus in two ways: First, by fertilization, and second, by the soil supply. Xinjiang agricultural soil total phosphorus content is more abundant, generally between 0.15-0.25. But the available phosphorus content is very low (below 5PPm as much as 70%), indicating that the ability of phosphorus in the soil is weak. At present, there is a serious shortage of organic fertilizer and fertilizers in Xinjiang, and the phenomenon of white sowing is still seen everywhere. Under such circumstances, if we can speed up the transformation of non-available phosphorus in soil to available phosphorus, we can meet the needs of crops for phosphorus nutrients, reduce production costs and increase economic benefits. Planting green manure is a powerful measure to achieve these goals.