Characteristics of Decomposition and Nutrients Release of Wheat Straw under Different Returning Methods
Net bag method was used to determine the characteristics of wheat straw decomposing and its nutrient releasing under different straws returning approaches.The results showed that the decomposing efficiencies of wheat straws in different treatments were from 37.75％ to 68.34％ after 85 d.Compared with mulching the field,the average decomposition rate of burying straw was increased by 61.59％.During the whole process,the trend of its nutrient releasing was consistent with that of straw decomposition.The decomposition rate of straw and the releasing rate of nutrients were much faster at the beginning stage than at the later stage.In nutrient release,at the end of the experiment,the potassium release rate of straw mulching treatment was 81.60％,and the release rate of straw burying treatment was 85.79％;And the nitrogen release rate of straw mulching treatment was 49.72％,and the nitrogen release rate of straw burying treatment was 60.94％.In the degradation of straw,at the end of the experiment,the average decomposition rate of cellulose,hemicellulose and lignin in the straw burying treatment was 60.89％,84.83％,36.94％,increased by 27.64％,20.12％ and 49.25％ respectively compared with the straw mulching treatment.In conclusion,in the process of straw decomposition,the degradation and nutrient release of the straw burying treatment are better than the straw mulching treatment.The application of chemical fertilizer has no significant effect on the decomposition of wheat straw and nutrient release.
国家科技期刊平台
NSTL
万方数据
维普
