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种植绿肥是我国农业的传统经验,也是现代农业体系中维持土壤碳氮营养平衡的一个重要环节。绿肥腐烂分解,加速土壤有机质的循环,补充土壤中大量的活性有机物质,在微生物的作用下,一方面进行矿质化过程,释放养分,供应作物生长,提高作物产量;另一方面进行腐殖化过程,形成新的腐殖质,增加土壤潜在和速效养分,达到改土培肥的目的。从1981年起,我所在苏北滨海盐土上搞了长期定位试验,现将绿肥在大麦上的试验结果整理如下:
Planting green manure is the traditional experience of agriculture in our country and also an important step in maintaining the balance of soil carbon and nitrogen nutrition in modern agricultural system. Degradation of green manure decomposes, accelerates the circulation of soil organic matter and replenishes a large amount of active organic matter in the soil. Under the action of microorganisms, mineralization, nutrient release, crop growth and crop yield increase; on the other hand, humification Process, the formation of new humus, increase soil potential and quick-acting nutrients, to achieve the purpose of soil improvement and fertilization. Since 1981, I have engaged in long-term positioning tests on the coastal salt soil in northern Jiangsu. Now the test results of green manure on barley are summarized as follows: