旱地土壤培肥的研究

Soil Fertility Enrichment on Arid Soil

旱地田间定位试验结果表明:单施N、P化肥,能够明显地提高小麦产量,并可给耕层土壤积累一定数量的有机质和N素,增长幅度10％左右;单施有机肥虽能很快地培肥地力,但在增加产量上同化肥处于相当水平;有机肥配合化肥,既能大幅度地提高产量,又能快速、全面地培肥土壤,在实践中应大力倡导。当耕层土壤碱解N含量达90μg/g左右时,可能引起小麦倒伏。

The fixed position experiments on arid soil showed that single application of N and P chemical fertilizers could not only raise wheat yields significantly but also accumulate certain quantities of organic matter and N elements with a growth rate of about 10%. Although single application of organic fertilizers could both highly improve wheat yield and enrich soil rapidly and expensively and it should be widely encouraged in practice. It should be noticed that it may result in lodge of wheat when the contents of Alkali-digestible-N reached about 90