黑龙江风沙土区不同耕作措施对玉米地土壤水分及产量的影响

针对黑龙江省西部风沙土区干旱频繁发生、土壤风蚀严重的特点，采取打茬播种、旋耕播种、免耕等不同保护性耕作措施，与当地传统耕作的玉米进行对比试验。结果表明:旋耕措施对土壤含水量具有显著改善作用。旋耕处理土壤结构较好，能够有效接纳降水，增大储水库容；免耕条件下对土壤水分的影响主要表现在玉米生长前期及中期，免耕处理耕作次数较其它处理少，在春季保持了底层土壤水分。旋耕处理的玉米产量最高，与对照相比增加了31.2%；其次为打茬播种处理，产量比对照增加了13%；免耕处理的玉米产量最低，与对照相比产量降低了20.4%。

Effect of Different Tillage Patterns on Soil Moisture and Yield of Corn in Sandificational Area of Heilongjiang Province

For the features of frequent droughts and serious soil erosion in sandificational area of Heilongjiang Province,the conservation tillage of fight stubble,rotary tillage and no-tillage were comparison with the local traditional tillage.The results showed that the soil moisture was improved significantly by rotary measure.Under the condition of rotary treatment,structure of soil was better and able to retain the precipitation effectively for increasing the capacity of water storage.The effects on soil moistur...