Preliminary Report on Conservation Tillage in Dryland in Yellow River Basin
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.
No-tillage Conventional tillage Dryland Yellow River Basin
Li Lijun Liu Jinghui Zhu Jianguo Chen Peiyi Su Shunhe Ren Tianzhi
Agronomy College, Inner Mongolia Agriculture University, Huhhot 010019, China Chinese Academy of Agriculture Sciences, Beijing 100081, China Huhhot Agricultural and Animal Husbandry Bureau, Huhhot 010030, China
国际会议
北京
英文
345-351
2006-10-14（万方平台首次上网日期，不代表论文的发表时间）