Abstract:

Stubble height was studied with different leave covered the soil respiration and the quantity combination of change, the soil enzyme activity of Inner Mongolia for clear protective cultivation on the Shangtuhaixiang climate change and the influence of soil productivity as well as local farms provide theoretical basis for scientific management. Tests for 2009, a total of three treatment: traditional farming (CT), leave low stubbly half quantity coverage (DH), leave low stubbly total quantity coverage (DW), leave high stubbly half quantity coverage (GH), leave high stubbly total quantity coverage (GW). Static boxes of soil respiration rate determination of farmland, and the hierarchical soil enzyme activity and soil nutrient were determined to clear the region's soil fertility status. Soil respiration rate in jointing stage seasonal variation peak, no-till leave compared with conventional tillage crop cover soil respiration rate was significantly lower stubble height no-tillage same leave covered significant difference, different quantity of no-tillage same cover quantity and leave the difference between different crop height of soil respiration rate was not significant, with straw mulching quantity decreased. Diurnal variation of single-peak curve changes in no-tillage leave high crop total content covers processing and atmospheric temperature and the correlation coefficient was 0.9239. Conventional tillage soil respiration rate and the correlation coefficient for atmospheric temperature, 0.8652 significant related level. No-till leave stubbly cover treatment could greatly improve the 0-5 cm and 5-10 cm soil organic matter, total amount of nutrients, available nutrient content and soil amidohydrolase and oxidation and reduction of the enzyme activity. Soil respiration and total nitrogen and hydrogen peroxide, soil nutrient and outside the enzyme hydrolysis enzyme was a significant or very significant positive correlation between soil organic matter, nutrient and alkaline phosphatase, invertase activity significant positive correlation between levels. No-till crop coverage than traditional farming leave could significantly reduce soil respiration rate. To improve soil surface 0-5 cm and 5-10 cm soil enzyme activity and soil fertility.