Preliminary report on conservation tillage in dryland in Yellow River Basin
文献类型: 外文期刊
第一作者: Li Lijun
作者: Li Lijun;Liu Jinghui;Ren Tianzhi;Zhu Jianguo;Chen Peiyi;Su Shunhe
作者机构:
关键词: no-tillage;conventional tillage;dryland;Yellow River Basin
期刊名称:PRINCIPLES AND PRACTICES OF DESERTIFICATION CONTROL, VOL I
ISSN:
年卷期: 2007 年
页码:
收录情况: SCI
摘要: Soil erosion is a major problem in the Yellow River Basin. Conservation agriculture which features reduced or zero tillage, mulch retention, crop rotations and cover crops, offers a possible solution. In this experiment, no-tillage and conventional tillage were compared in the Yellow River basin of Inner Mongolia. The results showed that: (1) In 0 - 5, 5 - 10, 10 - 15 and 15 - 20 cm soil layers, the soil temperature under conventional tillage was lower than that of no-tillage in maize, millet, glutinous millet and oat fields; In 0 - 10 and 10 - 20 cm soil layers, the soil water content of conventional tillage was higher than that of no-tillage. (2) For maize and glutinous millet, the soil organic matter content of no-tillage was higher than that of conventional tillage. For millet and oat, the soil organic matter content of no-tillage was lower than that of conventional tillage. For millet and oat, the soil total N content of no-tillage was higher than that of conventional tillage. For glutinous millet and maize, the soil total N content of no-tillage was lower than that of conventional tillage. For all crops, the soil contents of total P, dissolved N and readily available P of no-tillage were higher than those of conventional tillage. (3) The trial showed a yield decrease because no-tillage method was applied in the first year and no mulching. The maximum yield decrease (16.7%) was for glutinous millet, while the minimum (8.1%) was for maize. The yield decrease of millet and oat was 14.7% and 10. 4%, respectively.
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