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采用中国科学院千烟洲生态站1998年开始的定位试验数据,研究不同肥料(猪粪、秸秆、化肥)对稻田红壤碳、氮、磷养分及相关酶活性[β-1,4-葡萄糖苷酶(βG)、β-1,4-N-乙酰葡糖氨糖苷酶(NAG)、L-亮氨酸氨基肽酶(LAP)、酸性磷酸酶(AP)]的影响.结果表明:施用猪粪(OM)土壤中的βG、NAG和LAP活性显著高于其他处理,比对照(不施任何肥料)分别高1.4、2.6和1.9倍;土壤C/N提高、βG/(NAG+LAP)降低,说明施用猪粪有利于土壤中纤维素的降解和有机碳的积累.施用化肥提高了土壤中βG、NAG和LAP活性,而AP活性比对照低34%;土壤βG/AP和(NAG+LAP)/AP较高,而C/P和N/P较低,说明施用化肥导致稻田红壤无机磷的积累,抑制了土壤中分解磷酸多糖和磷脂的微生物功能.
Based on the experimental data of Qianyanzhou Ecological Station of Chinese Academy of Sciences in 1998, the effects of different fertilizers (pig manure, straw and chemical fertilizers) on the activities of carbon, nitrogen and phosphorus and the activities of related enzymes in paddy soils [β-1,4-glucosidase (βG), β-1,4-N-acetylglucosaminidase (NAG), L-leucine aminopeptidase (LAP) and acid phosphatase (AP) (P <0.05). The activities of βG, NAG and LAP in OM soil were significantly higher than those in the other treatments (1.4, 2.6 and 1.9 times higher than those in the control). Soil C / N and βG / The results showed that the application of pig manure was beneficial to the degradation of soil cellulose and the accumulation of organic carbon.Application of chemical fertilizers increased the activity ofβG, NAG and LAP in soil, but the activity of AP was 34% lower than the control. Soil βG / AP and (NAG + LAP) / AP was higher and C / P and N / P were lower, indicating that the application of chemical fertilizers led to the accumulation of inorganic phosphorus in the red soil of paddy soils, and inhibited the microbial function of decomposing phosphoglycerate and phospholipids in the soil.