大棚土壤盐分累积特征与调控措施研究

通过对昆明地区不同年限的大棚土壤的管理现状调查分析及采集次生盐渍化严重的土壤做调控盐分的盆栽模拟试验，研究了保护地大棚土壤次生盐渍化的形成特征以及土壤调理剂对大棚土壤盐分的调控效果，结果表明：随着大棚年限的增长，耕层土壤的盐分在增加，盐分组成以Ca²⁺和NO^-₃为主，0～60 cm土层的盐分剖面由露地的直筒型向倒锥形发展，由泥炭、沸石、锯末等改良材料组合成的土壤调理剂控盐效果显著，耕层土壤全盐含量降幅在19％～32％之间。

Characteristics of soil salt accumulation in plastic greenhouse and its control measures

According to investigation and analysis of the present soil management in plastic greenhouse of different ages in Kunming suburban, and pot experiment of salt controlling on the serious salt affected soil, the formation of soil salinization under protected condition and regulation effect of regulator on soil salt were studied. The results indicate that with the increasing of the greenhouse ages, the soil salt content of plough layer increases, the component of salt most are Ca~(2+), NO~-_3, and the salt profile model in soil profile of 0~60 cm was from straight canister to inverse triangle. The soil regulator which is made up of zeolite, peat, saw dust and straw can reduce salt content significantly, and the decrease of total salt content in plough layer is between 19%~32%.