本文關(guān)鍵詞： 鹽堿土 洗鹽 深松耕 排鹽溝　出處：《江蘇農(nóng)業(yè)科學》2017年09期 　論文類型：期刊論文

【摘要】：為研究旱作鹽堿農(nóng)田的有效洗鹽方式,在旱作條件下設(shè)置排鹽溝、深松耕等不同處理,開展農(nóng)田快速淋鹽試驗。結(jié)果表明:(1)"灌水量2 700 m3/hm~2+排鹽溝+深松耕"處理對040 cm表層土壤全鹽淋洗效果最佳,增加灌水量反而會減弱其排鹽作用;(2)2 700 m3/hm~2灌水量下,3個排鹽處理能均等有效地降低土壤耕層040 cm中SO_4~(2-)、K~+、Na~+、Cl~-等鹽離子含量,明顯消除20100 cm Mg2+聚集;升高灌水量至5 100 m~3/hm~2,深松耕處理的排鹽效果部分減弱,對照組80 cm Mg~(2+)聚集現(xiàn)象消失。"灌水定額2 700 m3/hm~2+排鹽溝+深松耕"模式全鹽和分鹽的淋洗效果最佳,為鹽堿地改良提供了技術(shù)參考。
[Abstract]:In order to study the effective way of salt washing in dry cropping saline-alkali farmland, different treatments such as salt drainage ditch and deep soaking were set up under dry farming conditions. The experiment of rapid salt leaching in farmland was carried out. The results showed that the treatment of "Irrigation 2 700 m3 / hm ~ (2) row salt ditch deep loosening" had the best effect on the total salt leaching of 0 40 cm surface soil. On the contrary, increasing the amount of irrigation will weaken the effect of salt removal. Under the irrigation amount of 2 700 m ~ 3 / h ~ (-2), the three salt removal treatments can effectively reduce the amount of so _ 4 ~ + ~ (-1) in 040 cm of soil plough layer and reduce K ~ (+ +) Na ~ (2 +). The accumulation of 20100 cm Mg2 was obviously eliminated by the content of ClO- isosalt ions. When the irrigation amount was increased to 5 100 m ~ (3 / h) / h ~ (-2), the salt removal effect of deep soaking treatment was partly weakened. The accumulation of 80 cm Mg~(2 disappeared in the control group. "Irrigation quota 2 700 m3 / hmg 2 drain deep soaking" model had the best elution effect of total salt and salt separation. It provides technical reference for saline-alkali soil improvement.
【作者單位】： 北方民族大學生物科學與工程學院;寧夏農(nóng)林科學院農(nóng)業(yè)資源與環(huán)境研究所;
【基金】：國家自然科學基金(編號:31060180) 國家科技支撐計劃課題(編號:2013BAC02B05) 2016年研究生創(chuàng)新項目(編號:YCX1648)
【分類號】：S156.4
【正文快照】： 隨著世界范圍內(nèi)資源和生態(tài)環(huán)境地惡化,土壤鹽漬化逐漸成為制約農(nóng)業(yè)健康發(fā)展的癥結(jié)[1]。我國34個省級行政區(qū)中有17個出現(xiàn)不同程度的土壤鹽堿化問題,主要集中分布在北方和濱海地區(qū),鹽漬土總面積已達到3 455萬hm2[2-3]。面對耕地面積日益萎縮的殘酷現(xiàn)實,開發(fā)改良鹽堿地能快速提高，

本文編號：1463246