不同栽植密度下大枣人工林土壤肥力研究

Soil Fertility of Ziziphus jujuba Plantation under Different Planting Densities

为探讨大枣栽植密度对土壤理化性质的影响,设置了600、750、900、1050、1200株hm^-2等5种不同的栽植密度,比较了大枣林间土壤中理化性质的变化。结果表明:较低的栽植密度有助于优化土壤结构,提高土壤孔隙度、透气性,降低土壤容重,提高土壤中有机质、全磷、全钾的含量。因此,从改善辽西地区的土壤结构的角度,可以适当降低大枣的栽植密度,以600~900株hm^-2为宜。

In order to study the effect of planting density of Ziziphus jujuba on soil physical and chemical properties, several planting densities of 600, 750, 900, 1 050 and 1 200 treeshm^-2 were set up. The changes of soil physical and chemical properties in Ziziphus jujuba forest were compared. Result shows that lower planting density is helpful to optimize soil structure, improve soil porosity, permeability, reduce soil bulk density and improve soil physical and chemical properties. The content of organic matter, total phosphorus and total potassium, therefore, in order to improve the soil structure in Western Liaoning Province, the planting density of Ziziphus jujuba can be reduced appropriately. Considering the change trend of total nitrogen content in soil, the recommended planting density is 600-900 treeshm^-2 .