水稻留高茬还田技术改良土壤效果研究

结合辽宁省耕地土壤有机质含量下降严重、养分失衡的情况,开展水稻留高茬还田技术对比试验,研究其对水稻生育性状和耕地理化性质的影响。试验结果表明:与对照相比,高留茬还田技术模式增产4.17%,增收72.23元/667 m²,且产投比高;土壤有机质、全氮、有效磷、速效钾含量均有不同程度的增加,耕层加深,容重下降,耕地质量得到明显提高。

Study on Effect of Soil Improvement by Rice Leaving High Stubble Returning Technique

Combined with the situation of serious decrease of soil organic matter content and nutrient imbalance in cultivated land in Liaoning Province,a comparative experiment was carried out to study the effects of rice leaving high stubble returning on rice growth characters and cultivated land physical and chemical properties.The results showed as follows:Compared with the control,the technical mode of high stubble returning increased the yield by 4.17%,72.23 yuan/667 m²,and the ratio of production to investment was high;The contents of soil organic matter,total nitrogen,available phosphorus and available potassium all increased in different degrees,the surface layer deepened,the bulk density decreased,and the quality of cultivated land improved obviously.