Mechanism of nutrient preservation and supply by soil and its regulation IV. Fertility regulation and improvement of brown earth type vegetable garden soil and their essence

Abstract

Abstract: Pot experiment studies on the fertility regulation and improvement of fertile and infertile brown earth type vegetable garden soils and their functionary essence show that under conditions of taking different soil fertility improvement measures,the nutrient contents in fertile and infertile soils were not always higher than the controls,but the aggregation densities of soil microaggregates were increased,and the proportion of different microaggregates was more rational.There was no significant relationship between soil productivity and soil microaggregates proportion.It is proved that the essence of soil fertility improvement consists in the ultimate change of the preservation and supply capacities of soil nutrients,and the proportion of soil microaggregates could be an integrative index to evaluate the level of soil fertility and the efficiency of soil improvement.

Key words: Soil fertility regulation and improvement, Brown earth type vegetable garden soil, Soil microaggregates, potential distribution area, DEM, spruce forest., site index model

CHEN Lijun, ZHOU Likai. Mechanism of nutrient preservation and supply by soil and its regulation IV. Fertility regulation and improvement of brown earth type vegetable garden soil and their essence[J]. Chinese Journal of Applied Ecology, 2000, 11(4): 532-534.

References

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