湖北宣恩不同海拔植烟土壤养分含量状况分析与综合评价

[目的]评价不同海拔土壤的综合肥力,并揭示土壤养分含量与海拔的关系。[方法]对湖北宣恩烟叶产区不同海拔的植烟土壤主要养分的含量状况进行分析。[结果]该产区的土壤养分总体适宜优质烟叶生产,其中,高海拔地区土壤的有机质、碱解氮及速效钾含量丰富,但磷素普遍缺乏;土壤有机质、全氮、碱解氮、速效钾含量在高海拔与中、低海拔间的差异达到了0.05显著水平,而其他养分含量差异不显著;不同海拔高度土壤的综合肥力指标值大小为高海拔>中海拔>低海拔,且在高海拔与低海拔间的差异达到了0.05显著水平,而高海拔与中海拔、中、低海拔间的差异不显著。[结论]该研究对该地区烟叶的生产及区划具有一定的指导意义,为该区烤烟种植区划和生产提供理论依据。

Analysis and Comprehensive Evaluation on Nutrients Content Status of Tobacco Soil at Different Altitudes in Xuanen of Hubei

[Objective] The study aimed to evaluate the comprehensive soil fertility at different altitudes and reveal the relationship between the soil nutrient content and the altitude height.[Method] The content status of main nutrient in tobacco soil at different altitudes in tobacco producing area in Xuanen of Hubei was analyzed.[Result] The soil nutrients in the producing area were suitable for high quality tobacco production in general.The high altitude areas were rich in organic matter,available nitrogen(N) and available(potassium) K contents and deficient in phosphorous.The differences between organic matters,total N,available N,available K contents in soils of high altitude and that of medium-low altitude reached significant level,but their differences in the other nutrients contents were not significant.The integrated fertility index of soil of different altitudes was high altitude > medium altitude > low altitude.The difference between high altitude and low altitude reached significant level,but the differences between high altitudes and medium altitudes and medium-low altitudes were not significant.[Conclusion] The research had some guiding significance on tobacco production and division of the area.It provided theoretical basis for tobacco planting division and production in the area.