摘要
为了减轻和抑制咸水灌溉土壤盐分积累及对土壤理化环境的影响,研究3种有机无机-土壤改良剂配方进行咸灌土壤改良试验。试验结果表明:有机无机-土壤改良剂能够明显地改善土壤物理环境,施用土壤改良剂的土壤容重比咸灌土壤和对照降低8.55%～12.82%;土壤毛管孔隙增加5.68%～10.63%;土壤渗水速率提高22.41%～49.14%。土壤改良剂能够有效地调控咸灌土壤的化学离子组成,施用改良剂处理的土壤Na++K+、Cl-分别比对照减少了43.38%～64.88%和99.65%～122.69%;Ca2+增加了15.91%～67.21%。改良剂B和C降盐效果较改良剂A更为明显,比咸灌土壤分别下降了20.45%～57.35%,同时土壤pH降低了0.36%～1.84%。有机无机-土壤改良剂还为土壤、作物提供了充足的天然腐殖酸、活性有机物质以及Ca、S等营养物质,增加了玉米抗逆能力,提高产量,比对照增产20.63%～34.28%。
To reduce or inhibit the effect of saline water irrigation on soil salt accumulation and soil physical and chemical conditions,the salt water irrigation test was carried out to study the effect of 3 types of organic-inorganic amendment on soil amelioration.The results showed that,organic-inorganic amendment could significantly improve the soil condition.Compared with CK（the same below）,the treatments with amendment decreased bulk density by 8.55%-12.82%,increased soil capillary porosity by 5.68%-10.63% and permeability coefficient by 22.41%-49.14%.Meanwhile,the soil amendment could be effectively regulate the soil chemical ionic composition,it reduced Na ＋ ＋ K ＋ by 43.38%-64.88% and Cl-by 99.65%-122.69%,increased Ca 2 ＋ by 15.91%-67.21%.Soil amendment B and C decreased soil total salt content by 20.45%-57.35%,and the effect were better than amendment A.The amendment also decreased soil pH by 0.36%-1.84%.The organic-inorganic amendment contained large natural humic acid,activity organic matter and nutrients such as Ca and S.So it could improve the anti-adversity ability of maize,and increased maize yield by 20.63%-34.28%.
出处
《中国农学通报》
CSCD
2012年第18期111-116,共6页
Chinese Agricultural Science Bulletin
基金
国家科技支撑计划项目"区域咸水灌溉条件下环境效应与土壤保育技术集成研究与示范"(2009BADA3B05-6)
关键词
土壤改良剂
咸灌土壤
盐分累积
土壤理化环境
玉米产量
soil amendment； saline water irrigation soil； salt accumulation； soil physical and chemical conditions； maize yield
