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中文摘要：
针对松嫩平原北部盐碱障碍型土壤，采用一年“土层置换＋秸秆阻断”（SD1）、连续两年“土层置换＋秸秆阻断”（SD2）和秸秆粉碎覆盖（CK）三种耕作方式，研究了对土壤物理性状、养分含量及盐分含量的改良效应。结果表明：0—40cm土层土壤容重和pH，SD2处理低于SD1及CK，容重分别降低8．61％和8．81％；土壤含水量，SD2处理高于SDl和CK；0～40cm土层土壤可溶性盐离子，SD2处理土壤可溶性盐分含量明显降低，达到了降低土壤耕层盐分的目的；SD2处理产量高于SD1处理和CK，SD2和SDl产量分别高于CK7．83％和3．89％，差异达到显著水平。
英文摘要：
Aiming at saline-alkali soil in the north of Songnen plain,improvement effects of soil physical proper- ties, nutrient content and salt content were analyzed under the tillage pattern of two consecutive year soil displace- ment with straw blocking, one-year handle and CK. The results showed as follows：soil bulk density and soil pH val- ue of 0 -40cm soil layer of SD2 are both lower than that of SDI handle and CK,whose soil bulk density reduces by 8.61% and 8.81%, respectively;soil water content has the same trend with soil bulk density and soil pH value;on the content and composition of soluble salt of 0 -40cm, SD2 handle is reduced obviously relation to SD1 handle and CK;the soil displacement with straw blocking tillage pattern could promote crop yield. Yield of SD2 is the highest, and followed by SD1 handle and CK. Yield of SD2 and SD1 handle increased by 7.83% and 3.89% ;respectively compared with the CK, and their differences reach at the significant level.
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