Different Fertilization Soil Respiration And Soil Traits In No-tillage

The experiment to no-tillage plowing on in 2008 for 7 years in Wuchuan. Studied no-till and tillage oats and fertilization on soil carbon changes and seasonal variation. Through statistical analysis studied the relationship of the soil respiration and soil physical, chemical properties, biological characteristics and root dry weight, to provide the theoretical basis of soil carbon management. The results show that:1. Peak of soil respiration changes in no-tillage fertilization farmland at 14:00 am, low tide at 5:00 am, the whole growth period fluctuates during the 89.99 ~ 512.15mg ? m-2 ? h-1, the peak is on August 5 at 206.41~512.15 mg ? m-2 ? h-1. Seasonal soil respiration have law rules consistent with soil temperature, by the l surface 5cm soil combined effect of temperature and humidity, Soil temperature is the main factor, Q10 is 1.43.2.Soil respiration and soil invertase activity was significantly correlated, regression equation y = 85.19x + 52.56, urease, alkaline phosphatase, catalase activity associated with poor; Soil respiration were significantly related to microbial biomass carbon and nitrogen. regression equation are y=12.19x +213.64 and y = 8.02x + 171.79,Soil respiration and soil microbial phosphorus poor correlation.3.Soil respiration rate was significantly correlated with soil organic matter, regression equation y=289.94x-265.25; With nitrogen, phosphorus and potassium were not significantly correlated. N, P fertilizer significantly affected soil respiration, K fertilizer and no fertilizer was not significant, NPK, N, P, K respectively, compared with CK soil respiration rate increased by 29%, 14.9%, 11.7% and 5.2%. To harvest grain oats 1kg amount of CO2 emissions required to evaluate the ecological fertilizer - production efficiency result show CK0.29 CO2-C ? kg-1 for the worst program, NPK 0.15 mg ? m-2 ? h-1 CO2-C ? kg-1 is the best program.4.The soil respiration rate of tilling were higher than the no-tillage, on June 20, July 15, Aug. 5, Aug. 20 and Sept. 15 quantitative value respectively increased by 8.5%, 10%, 9.5%, 18.1% and 9%, the average was 11%, yield of no-till was higher than conventional tillage by 29%, so no-tillage have a great significance in carbon sequestration, increasing production and reducing emissions of greenhouse gases.