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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。
Poplar is one of the main species of fast-growing and high-yield plantation in China. Simple and accurate evaluation of poplar forest soil nutrient status of the development of plantation is of great significance. Soil nutrient system research method (SNSA) has been successfully applied in the evaluation of farmland soil nutrients in China. This article for the first time applied this method to evaluate the soil nutrient status of poplar plantations in Jianghan Plain. Through the soil sample collection, physical and chemical characteristics analysis, laboratory prediction and optimal fertilization recommendation, field test validation process, the results of the field experiment and field laboratory results are consistent, indicating SNSA in the evaluation of poplar plantation soil nutrient status Is credible The results showed that N and Zn were the main nutrient limiting factors of soils in the experimental area, and the lack of N was greater than that of Zn. Figure 2 Table 3 Reference 13.