文献类型： 外文期刊

作者： Wang, Yanpeng ¹ ; Abbas, Adnan ¹ ; Wang, Xiaochan ¹ ; Yang, Sijun ² ; Odhiambo, Morice R. O. ¹ ; Ding, Qishuo ¹ ; Sun, ¹ ;

作者机构： 1.Nanjing Agr Univ, Coll Engn, Nanjing 210031, Peoples R China

2.Minist Agr, Inst Agr Resources & Environm, Jiangsu Acad Agr Sci, Key Lab Agr Environm Lower Reaches Yangtze River, Nanjing 210014, Peoples R China

关键词： tillage; straw incorporation; mechanical property; micro-structure

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN：

年卷期： 2020 年 10 卷 6 期

页码：

收录情况： SCI

摘要： A field experiment was conducted to study the effects of different tillage methods, and their interaction on the dynamic changes of straw decomposition rate, mechanical properties, and micro-structure of the stalk. A nylon mesh bag technique was used. An obvious change was observed in the decomposition rate of straw, and its mechanical, and micro-structural properties. The decomposition rate of straw was increased in all tillage treatments. Specifically, it increased consistently in conventional and dry rotary tillage, and sharply in wet rotary tillage. Furthermore, for all tillage, the mechanical properties like shear and bending strengths decreased sharply while compressive strength first decreased linearly and then increased, whereas the micro-structure of wheat straw showed a fluctuating trend, i.e., it changed neither regularly nor consistently over time. Moreover, the micro-structure of the stalk explained the morphological changes to the straw that returned to the field, which may impact the mechanical properties. However, these changes could not explain the degradation trend of straw directly. The findings of the study could be used as a theoretical reference for the design of tillage and harvesting machinery keeping in view soil solidification and compaction dynamics.