云南玉溪植煙土壤速效養(yǎng)分空間變異特征及應(yīng)用
發(fā)布時間:2019-07-22 17:31
【摘要】:為探討煙田土壤養(yǎng)分空間變異特征及利用空間變異進行分區(qū)管理的技術(shù)路線,以全國烤煙種植典型產(chǎn)區(qū)云南省玉溪市煙田土壤為例,形成土壤養(yǎng)分空間變異分析—空間分布—肥料養(yǎng)分推薦—分區(qū)配方的技術(shù)思路;跓焻^(qū)土壤養(yǎng)分數(shù)據(jù),應(yīng)用地理信息系統(tǒng)(GIS),采用地統(tǒng)計學(xué)方法研究煙區(qū)耕作層(0~20 cm)土壤堿解氮、有效磷和速效鉀的變異特征和空間分布。以鄉(xiāng)鎮(zhèn)作為管理單元,依據(jù)煙田土壤肥力評價及養(yǎng)分管理指標體系,計算出鄉(xiāng)鎮(zhèn)烤煙養(yǎng)分管理的氮、磷、鉀肥料推薦量。采用聚類分析方法,結(jié)合烤煙養(yǎng)分管理"核心是氮、品質(zhì)元素是鉀"的特點,提出玉溪烤煙養(yǎng)分管理5個管理分區(qū)、5個基肥配方、2個追肥配方。研究表明:玉溪煙田土壤速效養(yǎng)分為中等強度空間變異,擬合模型為指數(shù)模型,變異來源于結(jié)構(gòu)性因素和施肥等人為因素;土壤有效磷的變異最大,高于速效鉀和堿解氮,與氮肥和鉀肥用量相對穩(wěn)定,而磷肥相對隨機等農(nóng)藝措施相關(guān);超過67%的土壤堿解氮、有效磷和速效鉀含量處于高和極高水平,肥料氮、磷、鉀推薦量低于云南省烤煙養(yǎng)分管理平均水平11%左右;提出5個烤煙養(yǎng)分管理分區(qū)及相應(yīng)的基肥和追肥配方,以滿足"大配方、小調(diào)整"原則,實現(xiàn)分類指導(dǎo)和分區(qū)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,
本文編號: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,
本文編號:2517771
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