Effects of Tillage Methods on Soil Carbon and Wind Erosion

Land Degradation and Development - Tập 27 Số 3 - Trang 583-591 - 2016
Yong Gao1, Xiaohong Dang1, Yi Yu2, Yubao Li3, Yang Liu4, Ji Wang1
1College of Ecology and Environmental Science Inner Mongolia Agricultural University Hohhot 010019 PR China
2International Center for Bamboo and Rattan, Beijing 100102, PR China
3College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, PR China
4Institute of Water Conservancy Science Inner Mongolia Municipality Hohhot 010020 PR China

Tóm tắt

AbstractCurrent interest in soil‐conserving tillage in China has developed from the concern that Chinese agricultural land loses 73·8 Mg C annually. Previous research has shown that changing from conventional tillage to conservation tillage field management increases soil C sequestration. The aim of this study is to determine if no tillage with stubble retention can reduce soil carbon loss and erosion compared with conventional tillage for a cornfield in northern China. We found that soil organic C storage (kg m−2) under conservation tillage in the form of no post‐harvest tillage with stubble retention increased from 28% to 62% in the soil depths of 0–30 cm (p < 0·01) compared with the conventional tillage. Retaining post‐harvest stubble with a height of 30 cm and incorporating the stubble into the soil before seeding the next spring increased soil organic carbon the most. Carbon storage (kg ha−1) in aboveground and belowground biomass of the corn plants in seedling and harvest stages was significantly greater (p < 0·01) with stubble retention treatments than with conventional tillage. Carbon content in root biomass in all treatments with stubble retention was significantly greater than that with conventional tillage. Soil erosion estimates in the study area under conservation tillage with stubble retention was significantly lower than that under conventional tillage during the monitoring period. Given the complexities of agricultural systems, it is unlikely that one ideal farming practice is suitable to all soils or different climate conditions, but stubble retention during harvesting and incorporation of the stubble into soil in the next spring appears to be the best choice in the dry northern China where farmlands suffer serious wind erosion. Copyright © 2015 John Wiley & Sons, Ltd.

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Land Degradation and Development

Tập 27 Số 3

583-591

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