摘要
采用土柱室内模拟方法,通过模拟降雨研究添加不同碳源对苹果园土壤氮磷淋溶损失的影响。结果表明:NP与CK间土壤淋溶液体积无显著差异,但均显著高于G+NP和B+NP处理。淋溶液电导率的峰值均出现在试验开始后的第17天,添加外源碳显著提高了淋溶液的电导率,B+NP处理最大。各处理土壤淋溶液的NH4+-N和NO3--N浓度变化趋势一致,均先升高后降低,然后逐渐稳定。与单施NP处理相比,添加外源碳处理显著降低了土壤淋溶液的NH4+-N和NO3--N浓度及其累积量。到试验结束时,B+NP和G+NP处理的氮素淋失量仅为NP处理的57.87%和82.73%。施肥对可溶性磷的淋失量无显著影响,但各施肥处理的总磷淋失量却显著高于CK。与NP处理相比,添加外源碳处理显著降低了总磷的淋失量,以B+NP处理效果最好。
A laboratory simulation test was used to study the effect of carbon application on nitrogen and phosphorus leaching in apple orchard soil columns under simulated raining condition. The result showed that： There was no significant difference between NP and CK treatment in leachate volume, but it was much higher than that of G＋NP and B--NP treatments. The peak of electrical conductivity of the leachate was occurred on the seventeenth day after the beginning of the experiment, and the electrical conductivity of the leachate was much higher when added carbon, especially in N＋B treatment. Changing trends of NH＋ --N and NO3--N concentrations of leachate in the all treatments were consistent, increased at first, and then decreased. Compared with NP treatment, adding carbon could significantly reduced NH＋ --N and NO; --N concentrations and cumulative amounts of leachate of B＋NP and G ＋NP treatments. Nitrogen leaching amounts of B＋NP and G＋NP treatments were only 57.87% and 82.73G of NP treatment at the end of the study. Fertilization had no obvious impact on dissolved phosphorus leaching quantity, but the total phosphorus leaching amount was significantly higher than CK when fertilization with P. Compared with NP treatment, adding carbon significantly reduced the total phosphorus leaching amount, and the lowest was appeared in B＋NP treatment.
出处
《水土保持学报》
CSCD
北大核心
2013年第2期31-35,共5页
Journal of Soil and Water Conservation
基金
现代农业产业技术体系建设专项(CARS-28)
公益性行业(农业)科研专项(201103003)
山东省农业重大应用创新项目(201009)
关键词
苹果园土壤
氮
磷
葡萄糖
生物炭
淋溶
apple orchard soil
nitrogen
phosphorus
glucose
biochar
leaching
