The results showed that the levels of nutrients in the soils were very low, especially for the available nutrients in the soils.
结果表明，研究地区林地土壤养分普遍缺乏，其中以土壤有效养分的缺乏尤为严重。
In this study, the effects of different amounts of residue incorporation on the contents of soil available nutrients and corn yields were examined under no-till practices.
研究了不同秸秆还田量对免耕黑土速效养分含量和玉米产量的影响。
The results showed that, mulched hole planting could improve soil temperature, conserve soil moisture, and promote full release and efficient use of soil rapidly available nutrients.
结果表明，覆膜穴播可以提高土壤地温，保持土壤水分，促进土壤速效养分的充分释放和有效利用。
Fertilization can increase the contents of soil available nutrients.
但施肥能明显提高土壤有效养分含量。
It increased plough layer soil water and available nutrients content.
大豆覆膜增加了土壤水分与速效养分含量。
The contribution of different types of active soil organic carbon to soil available nutrients was different.
土壤活性有机碳的不同类型对土壤养分的有效性贡献不同。
The results showed that soil organic matter under alkaline soil condition may affect remarkably the content of available nutrients.
结果表明土壤有机质可显著影响有效态养分含量。
This paper studies the fertilization of gangue weathering matter centered around its serious deficiencies in organic active matter and available nutrients.
围绕煤矸石缺乏有机活性物质及有效养分的问题，在矸石山复垦种植时，对施肥作了试验研究。
The semi-variation structure for most soil available nutrients was obvious and the rate of structural variation accounted for more than 50% of the total variation.
大多数土壤速效养分的半方差结构明显，结构性方差占总方差的比例均在50%以上。
The results showed that nutrients contents of the tree leaves and contents of the available nutrients of soil in the mixed stand and pure one varied with seasons of the year.
结果表明，一年中混交林及纯林土壤速效养分和叶养分含量随季节而异。
Taking a typical karst mountain area, Nongla in Guangxi as an example, the correlation between soil organic matter and the content of available nutrients in selected soils was discussed in this paper.
以广西弄拉峰丛山区为例探讨岩溶区偏碱性条件下土壤有机质与有效态养分含量之间的相关关系。
Taking a typical karst mountain area, Nongla in Guangxi as an example, the correlation between soil organic matter and the content of available nutrients in selected soils was discussed in this paper.
以广西弄拉峰丛山区为例探讨岩溶区偏碱性条件下土壤有机质与有效态养分含量之间的相关关系。
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