Chen Xiao-Yun, Chen Shi, Liu Man-Qiang, Jiao Jia-Guo, Li Hui-Xin, Hu Feng
Laboratory of Soil Ecology, College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
Ying Yong Sheng Tai Xue Bao. 2013 Feb;24(2):467-72.
A 60-day incubation experiment was conducted to study the effects of nitrogen fertilization (N), rice straw amendment (R), and their combination (RN) on the changes of soil microbial biomass and soil functions (basal respiration, substrate-induced respiration, and straw decomposition) after heat stress (40 degrees C for 18 h). Heat stress tended to promote the soil microbial biomass and soil functions, but the effects were weak and transient. Either with or without heating, treatment R and especially RN could greatly stimulate soil microbial biomass, basal respiration, substrate-induced respiration and straw decomposition, as compared to no straw amendment and with nitrogen fertilization alone, but the parameters in treatment N had less change, and even, presented a decreasing trend. It was suggested that straw amendment and its combination with nitrogen fertilization could improve soil functions in natural conditions or after environmental stress.
进行了一项为期60天的培养实验，以研究施氮（N）、添加稻草（R）及其组合（RN）对热胁迫（40℃处理18小时）后土壤微生物生物量和土壤功能（基础呼吸、底物诱导呼吸和稻草分解）变化的影响。热胁迫倾向于促进土壤微生物生物量和土壤功能，但效果微弱且短暂。无论是否加热，与不添加稻草和仅施氮肥相比，处理R尤其是RN能极大地刺激土壤微生物生物量、基础呼吸、底物诱导呼吸和稻草分解，但处理N中的参数变化较小，甚至呈下降趋势。研究表明，添加稻草及其与氮肥的组合可以在自然条件下或环境胁迫后改善土壤功能。
