Severe soil acidification is a major constraint to Phyllostachys praecox production of Lin’an City, Zhejiang Province. In order to improve bamboo shoots production, it is important to meliorate soil acidity and enhance the availability of soil nitrogen. Soil samples from Phyllostachys praecox under various planting years were selected to simulate and analyze the effect of liming on soil nitrogen availability. An intermittent leaching method was adopted to investigate nitrogen mineralization rates and potentials in bamboo soils under various lime application rates. The results showed that soil pH decreased greatly, soil organic matter and nitrogen content in the surface soil increased obviously with the increase of bamboo planting time. A first-order kinetic model could be used well to predict N mineralization as a function of time. The N0×k value of nitrogen mineralization with liming was significantly higher than that without liming, which suggested that liming measure could increase soil nitrogen availability greatly. According to estimation, the suitable amount of lime on bamboo soil was 4-8 g/kg; excessive lime could cause soil mineral nitrogen accumulated excessively, and then increase soil nitrogen loss. Overall, a rational application of lime in acid soil can increase soil pH value and improve soil available N pool and N mineralization rate to enhance the productivity of acidic soils.
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程 琳,孙 晓,庄舜尧,杨 浩.模拟石灰添加对雷竹林土壤氮矿化的影响[J].土壤,2013,45(6):992-998. CHENG Lin, SUN Xiao, ZHUANG Shun-yao, YANG Hao. Effect of Liming on Soil Nitrogen Mineralization of Phyllostachys praecox Using Lab Incubation Experiment[J]. Soils,2013,45(6):992-998