有机、无机肥料施用后土壤生物量C、N、P的变化及N素转化
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* 国家自然科学基金,批准号:39430090


CHANGES OF SOIL MICROBIAL BIOMASS C, N AND P AND THE N TRANSFORMATION AFTER APPLICATION OF ORGANIC AND INORGANIC FERTILIZERS
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    摘要:

    研究结果表明,有机、无机肥施用后,土壤微生物量C、N、P开始增加很快,随着时间的推移,土壤微生物量C又有所降低,但生物量N和P则基本保持稳定。硫铵施入土壤后,微生物对肥料15N的生物固持10天后达到最高峰,以后被固持在体内的15N有一部分被逐渐释放出来,但一个月后仍有17%左右的15N被固持在微生物体内。硫铵与有机肥配合施用时,微生物对硫铵15N固持比例有所增加。有机肥中的15N被微生物固持的比例也较大,在肥料施入20天左右达到最大值,一个月后仍有19-25%存在于微生物体内。硫铵施用一个月后15N损失高达18%,有机肥中的N也有少量被损失。

    Abstract:

    Experiments were carried out to study the changes of soil microbial biomass C, N and P and the transformation of N after application of organic and inorganic fertilizers by using isotope of 15N. The results showed that the soil microbial biomass C, N and P increased greatly after application of organic manures at the beginning of the experiment, and thereafter the biomass C decreased, but the biomass N and P remained constant. The immobilization of 15N rose to the highest about 10 days after application of 15N-labelled (NH)2SO4 and one month latter about 17% of the 15N was still in the soil microbes; when combined with organic manures the immobilization of 15N from (NH;), SOS increased. About 19-25% of 15N from the 15N-labelled organic manures was also immobilized in the microbes at the 30th day after application. In case (NH)2SO4 was applied alone the loss of N was about 18%, however, when combined with organic manure the loss decreased.

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王岩,沈其荣,史瑞和,黄东迈.有机、无机肥料施用后土壤生物量C、N、P的变化及N素转化[J].土壤学报,1998,35(2):227-234. DOI:10.11766/trxb199702110211 Wang Yan, Shen Qi-rong, Shi Rui-he. CHANGES OF SOIL MICROBIAL BIOMASS C, N AND P AND THE N TRANSFORMATION AFTER APPLICATION OF ORGANIC AND INORGANIC FERTILIZERS[J]. Acta Pedologica Sinica,1998,35(2):227-234.

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  • 收稿日期:1997-02-11
  • 最后修改日期:1997-08-25
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  • 在线发布日期: 2013-02-25
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