Tian Shen-Zhong, Ning Tang-Yuan, Wang Yu, Li Hong-Jie, Zhong Wei-Lei, Li Zeng-Jia
State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai' an 271018, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2010 Feb;21(2):373-8.
A two growth seasons experiment was conducted to study the effects of different tillage methods, straw-returning, and their interaction on the dynamic change of organic carbon content in 0-20 cm soil layer during the whole growth period of winter wheat. An obvious change was observed in the soil organic carbon content. Treatments with straw-returning had higher soil organic carbon content than treatments with no straw-returning, and conservation tillage induced higher soil organic carbon content than conventional tillage. In all treatments except conventional tillage, the organic carbon content in 0-10 cm soil layer was higher than that in 10-20 cm soil layer. In treatments with straw-returning, the organic carbon content in 0-10 cm soil layer decreased in order of deep soiling (PS) > rotary tillage (PR) > no tillage (PZ) > normal ploughing (PH) > conventional tillage (PC), while that in 10-20 cm soil layer was PC > PS > PR > PH > PZ, suggesting that conservation tillage could improve the organic carbon content in 0-10 cm soil layer. Multi factor variance analysis showed that tillage method, straw-returning, and their interaction had significant effects on the organic carbon content in 0-20 cm soil layer at various growth stages of winter wheat.
进行了一项为期两个生长季的试验，以研究不同耕作方式、秸秆还田及其交互作用对冬小麦全生育期0-20厘米土层有机碳含量动态变化的影响。观察到土壤有机碳含量有明显变化。秸秆还田处理的土壤有机碳含量高于无秸秆还田处理，保护性耕作诱导的土壤有机碳含量高于传统耕作。在除传统耕作外的所有处理中，0-10厘米土层的有机碳含量高于10-20厘米土层。在秸秆还田处理中，0-10厘米土层的有机碳含量按深松（PS）>旋耕（PR）>免耕（PZ）>常规翻耕（PH）>传统耕作（PC）的顺序降低，而10-20厘米土层的有机碳含量为PC>PS>PR>PH>PZ，表明保护性耕作可提高0-10厘米土层的有机碳含量。多因素方差分析表明，耕作方式、秸秆还田及其交互作用对冬小麦不同生长阶段0-20厘米土层的有机碳含量有显著影响。
