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稻草直接还田的生态效益和增产效益,愈来愈为人们所认识,过去,人们认为稻草直接还田,只是给晚稻生长解决了部分硅和钾等营养元素。随着研究的深入,发现稻草直接还田具有改善土壤物理性状、固定保存氮素营养等作用。因为稻草直接还田,其新鲜腐殖质在土壤中形成后,便与土壤结合,促进了土壤团粒结构的形成,加速了土壤的不断熟化。研究表明:稻草直接还田的改土作用比施用腐熟有机肥料的改土作用还略胜一筹,前者所形成的腐殖质,其活性比
The direct benefits of straw to the field and increase production efficiency, more and more people know, in the past, people think straw directly to the field, but to late rice growth to solve part of the silicon and potassium and other nutrients. With the deepening of research, it was found that the direct straw returning has the effect of improving soil physical properties and preserving nitrogen nutrition. Because the straw directly back to the field, the fresh humus formed in the soil, they combined with the soil, and promote the formation of soil aggregate structure, accelerated soil maturation. The results showed that the effect of soil straw returning directly to soil was slightly better than that of applying organic fertilizer with decomposed organic fertilizer. The humus formed by the former had higher activity ratio