| Effects of different conservation tillage measures on spring maize yield and soil fertility in the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2011.04.36 |
| Key Words: conservation tillage spring maize water use efficiency soil fertility |
| Author Name | Affiliation | | WANG Chanjun | College of Forest, Northwest A & F University, Yangling, Shaanxi 712100, China | | HAO Mingde | Institute of Soil and Water Conservation, Chinese Academy of Sciences and Mi
nistry of Water Resources, Yangling, Shaanxi 712100, China
College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | SHE Fengxia | College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | BAO Yanjie | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| This research is based on the implement of tillage and no-tillage farming with straw mulching, plastic film mulching, straw and plastic film mulching or without mulching to study the changes of spring maize yield and soil fertility. The result shows: On the basis of tillage without mulching spring maize yield is 6 212.75 kg/hm2, straw mulching increases yield by 45.67% compared with no mulching, plastic film mulching increases yield by 47.24%, straw and plastic film mulching increases yield by 73.24%; On the basis of no-tillage with straw mulching the yield increases only by 3.07% compared with no mulching, and plastic film mulching increases yield by 28.91%, while straw and plastic film mulching increases yield by 38.74%. Compared with tillage farming, no-tillage farming increases yield by 19.69% in no mulching condition, but it decreases yield by 15.31% in straw mulching condition. Under the same farming method, water use efficiency trend is straw and plastic film mulching＞plastic film mulching＞straw mulching＞no mulching, water use efficiency of no-tillage farming reduces at an average of 11.56% compared with tillage farming. Soil organic matter content under straw mulching rises by 0.62 g/kg compared with no mulching while that under plastic film mulching drops by 0.30 g/kg. The content of available P under plastic film mulching is the lowest, it declines at an average of 2.93 mg/kg compared with no mulching. The content of available K of no-tillage farming increased 9.54 mg/kg compared with tillage farming, but there is no si
gnificant changes of total P. |
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