江汉平原杨树人工林土壤养分状况评价

Evaluation on Soil Nutrient Status of Poplar Plantation in Jianghan Plain

应用土壤养分状况系统研究法(SNSA法)对江汉平原杨树人工林土壤养分状况进行了评价。通过设置CK(不施肥)、OPT(N、P、K、Zn)、-N(P、K、Zn)、-P(N、K、Zn)、-K(N、P、Zn)、+Mg(N、P、K、Mg、Zn)、-Zn(N、P、K)、+2P(N、2P、K、Zn)、+2K(N、P、2K、Zn)、2N+2P+2K(2N、2P、2K、Zn)等10个处理进行田间验证,结果表明:试验地区的土壤养分主要限制因子为N和Zn,且N缺乏程度大于Zn。研究显示采用该方法所获得的推荐施肥结果与田间试验结果完全吻合,证明该方法在杨树人工林土壤养分状况评价上具有较高的应用价值。

A study was conducted to evaluate the soil nutrient status of poplar plantations by Soil Nutrient Systematic Approach (SNSA) in Jianghan Plain, Hubei Province. Ten treatments of application with different fertilizers were designed such as CK, OPT(N,P,K,Zn), -N(P,K,Zn), -P(N,K,Zn), -K(N,P,Zn), +Mg(N,P,K,Mg,Zn), -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. 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.