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| Soil fertility quality of artificial forest in the Hilly-gully region of Loess Plateau |
| Chang Qingrui1,Yue Qingling1,2 |
| 1.College of Resources and Environment,Northwest A&F University,712100,Yangling,Shaanxi;2.College of Resources and Environment,Henan Institute of Science and Technology,453003,Xinxiang,Henan: China |
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Abstract Taking Wuqi County of Shaanxi Province as an example,in order to compare the effects of the different plantation on the soil fertility in Hilly-gully region, the determination analysis of soil samples and the mathematical statistic were carried on the different shrub and the arbor tree land.The result indicated: 1) The soil AN and AK content of Caragana intermedia was the twice of Hippophae rhamnoides,there was the extremely remarkable level between them.The improving effect of soil fertility of Caragana intermedia was better than Hippophae rhamnoides.Only from the improving of soil fertility,it is suggested to plant Caragana intermedia as a good choice.2) From the young-age of arbor tree land to the mature wood,the soil TN,AN,OM and CEC content was unceasingly increases,the soil AK,TP and AP content had the slight increase,the surface gathering of soil OM and nutrient was obvious and strengthening.In overall, in 0-100 cm soil layer of arbor tree land,the soil AN,AK,OM,CEC,TN,TP and TK content were higher than those of the shrub land.It indicated that the contribution to soil fertility of arbor tree land was better than that of the shrub land.
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Received: 13 March 2007
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