黑土开垦后肥力演变的研究
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A STUDY ON THE FERTILITY OF BLACK SOIL AFTER RECLAMATION
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    摘要:

    黑土在黑龙江省分布很广,占全省耕地面积的45.2%1),是该省的主要耕地土壤及产粮区,在商品粮基地建设中具有重要意义。由于黑土的土质肥沃,便于耕种,是优先开发的对象,解放后在该地区组建了大批国营农场,实行机械化耕种。

    Abstract:

    The present paper deals with the fertility ehange of black soil after its cultivation from the virgin land in Heilongjiang province.Results obtained showed that under the influence of mechanical cultivation and current agricultural system,signifieant changes on the properties of black soil were brought by its cultivation.The development of soil fertility has been found in three stages—aetlvation,cultivation and restoratlon.It was observed tliat with the Increase of the time of cultivation,the thiekness of humus horizon,the oontente of humus,total N,hydrolyzed N and the value of C/N were decreased;at the same time, the soil aggregates were disintegrated gradually,the amount of soil microaggregate and its G1-fraction,and the humus carbon and total N in both G1 and G2 fraction of microaggregate were depressed;the specific gravity and volume weight of soil were inoreased,whereas its porosity was deereased.The amount of available P and K inereased in varying extent following the developing of eultivation of the soil. The crop yield was higher in the first ten years after reclamation, and then a significant depression was found.

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丁瑞兴,刘树桐.黑土开垦后肥力演变的研究[J].土壤学报,1980,17(1):20-32. Ding Rui-xing, Liu Shu-tong. A STUDY ON THE FERTILITY OF BLACK SOIL AFTER RECLAMATION[J]. Acta Pedologica Sinica,1980,17(1):20-32.

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  • 在线发布日期: 2013-02-25
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