云南玉溪植烟土壤速效养分空间变异特征及应用
发布时间:2019-07-22 17:31
【摘要】:为探讨烟田土壤养分空间变异特征及利用空间变异进行分区管理的技术路线,以全国烤烟种植典型产区云南省玉溪市烟田土壤为例,形成土壤养分空间变异分析—空间分布—肥料养分推荐—分区配方的技术思路。基于烟区土壤养分数据,应用地理信息系统(GIS),采用地统计学方法研究烟区耕作层(0~20 cm)土壤碱解氮、有效磷和速效钾的变异特征和空间分布。以乡镇作为管理单元,依据烟田土壤肥力评价及养分管理指标体系,计算出乡镇烤烟养分管理的氮、磷、钾肥料推荐量。采用聚类分析方法,结合烤烟养分管理"核心是氮、品质元素是钾"的特点,提出玉溪烤烟养分管理5个管理分区、5个基肥配方、2个追肥配方。研究表明:玉溪烟田土壤速效养分为中等强度空间变异,拟合模型为指数模型,变异来源于结构性因素和施肥等人为因素;土壤有效磷的变异最大,高于速效钾和碱解氮,与氮肥和钾肥用量相对稳定,而磷肥相对随机等农艺措施相关;超过67%的土壤碱解氮、有效磷和速效钾含量处于高和极高水平,肥料氮、磷、钾推荐量低于云南省烤烟养分管理平均水平11%左右;提出5个烤烟养分管理分区及相应的基肥和追肥配方,以满足"大配方、小调整"原则,实现分类指导和分区管理。
[Abstract]:In order to explore the characteristics of spatial variation of soil nutrients in tobacco field and the technical route of regional management by using spatial variation, taking the tobacco field soil of Yuxi City, Yunnan Province, a typical flue-cured tobacco planting area in China as an example, the technical idea of spatial variation analysis of soil nutrients, spatial distribution, fertilizer nutrient recommendation and zoning formula was formed. Based on the soil nutrient data of tobacco area, the variation characteristics and spatial distribution of soil alkali-hydrolyzed nitrogen, available phosphorus and available potassium in ploughing layer (0 鈮,
本文编号:2517771
[Abstract]:In order to explore the characteristics of spatial variation of soil nutrients in tobacco field and the technical route of regional management by using spatial variation, taking the tobacco field soil of Yuxi City, Yunnan Province, a typical flue-cured tobacco planting area in China as an example, the technical idea of spatial variation analysis of soil nutrients, spatial distribution, fertilizer nutrient recommendation and zoning formula was formed. Based on the soil nutrient data of tobacco area, the variation characteristics and spatial distribution of soil alkali-hydrolyzed nitrogen, available phosphorus and available potassium in ploughing layer (0 鈮,
本文编号:2517771
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