覆盖秸秆和补播牧草对松嫩退化盐碱草地土壤盐离子含量的影响  

The Influence of Straw Covering and Reseeding on Soil Ion Content in Saline and Alkaline Grassland in Songnen Plain

作　　者：阎南南[1] 崔国文[1] 张茜[1] 李景欣[1] 

机构地区：[1]东北农业大学动物科学技术学院,黑龙江哈尔滨150030

出　　处：《中国草地学报》2015年第2期112-116,共5页Chinese Journal of Grassland

基　　金：国家科技支撑计划"东北粮食主产区优质紫花苜蓿高效生产利用技术研究与示范"(2011BAD17B04-2)

摘　　要：在黑龙江省西部松嫩平原退化盐碱草地(pH 8.5)分别进行补播稗草(东饲1号和野大麦,同时分别覆盖0kg/m2、1kg/m2、1.5kg/m2、2kg/m2的粉碎玉米秸秆,以不覆盖秸秆+不补播牧草为对照,观测对下一年土壤离子含量的影响。结果表明:覆盖秸秆和补播牧草可以降低土壤Na+、Mg2+、HCO-3、SO2-4含量,增加土壤K+、Ca2+、Cl-含量,土壤化学性质得到一定的改善。覆盖秸秆1.5kg/m2同时补播野大麦与对照(不覆盖秸秆+不补播牧草)相比,土壤Na+、HCO-3和SO2-4含量分别降低了29.57%、45.48%和33.57%,Ca2+含量增加了36.97%,K+含量增加了1.7倍,改良效果最明显。Echinochloa crusgalli Beauv. cv. Dongsi No. 1, Hordeum brevisublaturn （Trin.） L. were reseeded and was covered with maize straw 0kg/m2, lkg/me, 1.5 kg/m2, 2kg/m2 respectively in saline-al- kaline land（pH 8.5） in Songnen plain in the west of Heilongjiang province compared with no covering maize straw and no reseeding herbage for control, the content of ion were tested for the next year. The ex periment results showed that covering maize straw and reseeding herbage re＆Jced the content of Na＋ , Mg2＋, HCO3 , SO42-and increased the content of K1 , Ca2＋ , Cl , soil chemical properties had been improved. Compared with no covering maize straw and no reseeding herbage, the effect of covering with maize straw of 1.5 kg/m2 and reseeding H. brevisublatum （Trin.） L. was the most obvious, the Na＇ , HCO3- and SO42 content were reduced by 29.57%, 48.48%, 33.57%, respectively; the Ca2＋ content was increased by 36.97%, and the K＋ content was increased by 1.7 times.

关 键 词：秸秆覆盖 补播 盐碱地 土壤离子含量 

分 类 号：S156.4[农业科学—土壤学]