配方施肥对红锥林地土壤肥力的影响

Effects of Formulated Fertilization on Soil Fertility of Castanopsis hystrix Forest

以2014年种植的红锥(Castanopsis hystrix)幼林苗木为试验材料,采用氮、磷、钾三因素三水平正交试验设计,研究不同配比处理对红锥林地土壤养分含量的影响,寻求红锥林地合理施肥配方,为改善其土壤肥力状况提供参考。结果显示:配方施肥对红锥林地土壤养分含量影响显著;与不施肥CK相比,各施肥处理土壤有机质含量、氮磷钾养分等指标均有不同程度的提高;其中,T6(单株施N、P2O5、K2O分别为87.5、243.8、25.0 g)处理的土壤硝态氮、铵态氮、有效磷、速效钾含量最高;模糊数学隶属函数综合评价结果表明,T6处理对土壤肥力的促进作用最大,是本试验条件下改善林地土壤肥力状况的最佳配方。

Castanopisis hystrix planted in 2014 were used as experimental materials.A three-factor and three-level orthogonal design was used to study the effects of diferent fertilization formula on soil fertility in Castanopisis hystrix forest and find out reasonable fertilization fomula so that to provide a scientific basis for improving the soil physical and chemical properties.The results showed that ferlitization had significant effects on soil nutrient contents in Castanopisis hystrix forest.Compared to CK,the fertilization treatment increased the organic matter and nitrogen,potassium and phosphorus contents in varying degrees.The T6 treatment with 87.5 g of N,243.8 g of P2O5 and 25.0 g of K2O per plant had the maximum contents of ammonium nitrogen,nitrate nitrogen,available phosphorus and available potassium in soil.Membership function analysis showed that T6 treatment had the greatest promoting effect on soil fertility,so it was the best ferlitization formula for improving the physical and chemical properties of forest soil.