樱桃栽培中施用蚯蚓粪对土壤有机碳氧化稳定性及碳库管理指数的影响

目的]探讨樱桃栽培中蚯蚓粪与化肥以不同比例配施对土壤有机碳、易氧化碳、氧化稳定性及碳库管理指数的影响,为提高土壤质量管理和增强农业固碳减排潜力提供依据。方法]通过5a的大田试验,研究N100(尿素提供100%的氮),M10N90(蚯蚓粪和尿素分别提供10%和90%的氮),M30N70(蚯蚓粪和尿素分别提供30%和70%的氮)和M50N50(蚯蚓粪和尿素各提供50%的氮)等不同施肥处理对土壤有机碳(SOC)、微生物量碳(MBC)、易氧化碳(ROC)含量、有机碳氧化稳定性及碳库管理指数(CPMI)的影响。结果]M30N70和M50N50处理的SOC含量分别比N100处理高出12.07%和18.75%;M30N70处理的MBC,ROC含量和CPMI均最高,并显著高于其它处理,其中ROC含量分别比N100,M10N90和M50N50处理提高51.34%,15.16%和6.47%,CPMI分别高出73.07,30.06和20.71;但M30N70处理的有机碳氧化稳定系数明显低于其他处理,比N100处理降低36.22%。结论]在樱桃栽培中配施蚯蚓粪措施有利于改善土壤质量,提高土壤肥力,其中蚯蚓粪与化肥以3∶7比例搭配的影响作用最显著。

Effect of Vermicompost on Soil Organic Carbon Oxidation Stability and Carbon Pool Management Index in Cherry Plantation

Objective] To explore the effect of vermicompost on soil organic carbon oxidation stability and carbon pool management index in cherry plantation(Cerasus pseudocerasus), in order to provide scientific basis for improving soil quality management and the increase of agriculture carbon emission reduction potential. Methods] A field experiment was conducted to determine the five treatments, CK(neither urea nor vermicompost was applied), N₁₀₀(100% of nitrogen was provided by urea), M₁₀N₉₀(10% and 90% of nitrogen was provided by vermicompost and urea, respectively), M₃₀N₇₀(30% and 70% of nitrogen was provided by vermicompost and urea, respectively), and M₅₀N₅₀(50% and 50% of nitrogen was provided by vermicompost and urea, respectively) on soil organic carbon(SOC), microbial biomass carbon(MBC), readily oxidizable carbon(ROC) contents, organic carbon oxidation stability, as well as carbon pool management index(CPMI) of Cerasus pseudocerasus. Results] The SOC contents under M₃₀N₇₀ and M₅₀N₅₀ treatments increased by 12.07% and 18.75% in comparison with the N₁₀₀ treatment, respectively. The MBC and ROC contents and CPMI achieved the highest value in M₃₀N₇₀ treatment and had significant differences with other treatments, showing 51.34%, 15.16% and 6.47% increases in ROC content and 73.07, 30.06 and 20.71 increases in CPMI, respectively, compared to the treatments of N₁₀₀, M₁₀N₉₀ and M₅₀N₅₀. However, the oxidation stability index of organic carbon in M₃₀N₇₀ treatment was obviously lower than other treatments, which decreased by 36.22% compared with N₁₀₀ treatment. Conclusion] In the cherry cultivation, application of vermicompost co-applied with inorganic fertilizer, especially the M₃₀N₇₀ treatment, was beneficial on soil quality amelioration and soil fertility improvement.