北方农牧交错带温性盐碱化草地土壤呼吸对不同形态氮添加和刈割的响应
胡姝娅1,2,刁华杰1,3,王惠玲3,薄元超3,申颜1,孙伟4,董宽虎3,黄建辉1,2,王常慧1,*(
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Response of soil respiration to addition of different forms of nitrogen and mowing in a saline-alkali grassland in the northern agro-pastoral ecotone
HU Shu-Ya1,2,DIAO Hua-Jie1,3,WANG Hui-Ling3,BO Yuan-Chao3,SHEN Yan1,SUN Wei4,DONG Kuan-Hu3,HUANG Jian-Hui1,2,WANG Chang-Hui1,*()
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图4. 北方农牧交错带温性盐碱化草地不同处理的生长季土壤CO2排放量(平均值+标准误差)。CK, 对照处理; M, 刈割处理; SUN, 添加缓释尿素处理; SUN + M, 添加缓释尿素+刈割处理; UN, 添加尿素处理; UN + M, 添加尿素+刈割处理。*, 差异性在0.05水平上显著。
Fig. 4. CO2 cumulative emissions during the growing season under different treatments of saline-alkali grassland in the northern agricultural-pastoral ecotone (mean + SE). CK, control treatment; M, mowing treatment; SUN, slow release urea treatment; SUN + M, slow release urea and mowing treatment; UN, urea treatment; UN + M, urea and mowing treatment. *, difference is significant at the 0.05 level.
