秸秆还田与减量施肥对双季稻产量及土壤酶活性的影响

Effect of Straw Application and Fertilizer Application Reduction on the Double Cropping Rice Output and Soil Enzyme Activity

在田间试验条件下,研究了优化施肥基础上的秸秆还田与减量施肥对双季稻产量和土壤酶活性的影响。结果表明,秸秆还田下优化施肥不减量或一定程度的减氮、减磷、减钾和减氮磷钾都会对早稻产量和双季稻总产产生降低作用,而对晚稻的产量无显著的降低或提高作用。秸秆还田下优化施肥或一定程度减氮、减磷、减钾和减氮磷钾会对土壤脲酶活性产生显著的降低作用,秸秆还田下优化施肥一定程度减钾可显著提高土壤蔗糖酶的活性,秸秆还田下优化施肥一定程度减氮则会显著降低土壤纤维素酶活性。

The thesis studied on the output of double cropping rice and the effect of soil enzyme activity with straw returning to the field based on optimizing fertilization by field experiment. The results revealed that both optimizing fertilization without any reduction or reduction to a certain ammount of N, P, K, could reduce the output of early rice and double cropping rice, but the effect, reducing or increasing, was not ob- vious on/ate rice. With straw returning, soil enzyme activity, all markedly damaged urease activity. Soil enzyme activity improved soil sac- charase activity when reducing fertilizing amount of K and damaged soil cellulase activity when reducing fertilizing amount of N.