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杨树是中国速生丰产人工林主要树种之一.简单、准确的评价杨树林地的土壤养分状况对人工林的发展具有重要意义.土壤养分系统研究法(SNSA)在评价我国农田土壤养分状况方面已有成功的应用,本文首次应用该法对江汉平原杨树人工林的土壤养分状况进行了评价.通过土壤样品的收集、理化特征分析、实验室预测与最佳施肥推荐、田间试验验证等过程,研究结果认为田间试验结果与实验室的预测一致,表明SNSA在评价杨树人工林土壤养分状况方面是可信的.结果表明,N和Zn是试验地区土壤主要养分限制因子,且N的缺乏程度大于Zn.图2表3参13.“,”A study was conducted to evaluate the soil nutrient status of poplar plantation by Soil Nutrient Systematic Approach (SNSA) in Jianghan Plain, Hubei Province, China. Soil physiochemical properties were analyzed in laboratory through collection soil samples of study site. Ten treatments of application different fertilizers were designed such as CK, optimum treatment (N, P, K, Zn), -N(P, K, Zn), -P(N, K, Zn), -K(N, P, Zn), +Mg(N, P, K, Zn, Mg), -Zn (N,P,K), +2P(N, 2P, K, Zn), +2K(N, P, 2K, Zn), and 2N+2P+2K(2N, 2P, 2K, Zn) for field experiment to test the effect on tree height, diameter (DBH) growth, and dry weight of poplar. The results showed that there was no significant difference in tree heights between treatments with different fertilizers, diameter growth of poplar trees in treatments of lack of N and Zn was significantly slower than that of trees in optimum treatment, and dry weight of poplar dropped significantly for treatment of CK as well as treatments without application N and Zn. It is concluded that N and Zn were main limiting factor for poplar growth. Results from laboratory analysis and field experiment were uniform perfectly, which proved that SNSA was reliable in evaluating soil nutrient status of poplar plantation.