|
|
|
| Study on Soil Moisture and Benefits of the Apricot-alfalfa-covering system on the slopeland of the Loess Regions |
| Wang Yanping，Zhang Hai,Liu Shengyu,Yang Ronghui,Lei Yushan,Ma Yiming |
| Institute of Loess Plateau Restoration, Northwest Sci-Tech University of Agriculture and Forestry,712100, Yangling, Shaanxi, China |
|
|
|
|
Abstract In order to control soil erosion and water loss of the slopeland, the soil moisture and benefits of the Apricot-alfalfa-covering system on the slopeland in the Loess Regions has been studied. It showed that the moisture and nutrient status of the systems within 0～60cm soil layer and inside the planting-pit are obviously better than the planting apricot without covering. The soil moisture status within the concentrated-distributing layer inside the root of the young trees is also better than the planting apricot without covering, but the deep soil layer dried seriously and the dried soil layer is formed at 120cm deep. When the spacing distance between Apricot and alfalfa is more than 120cm, soil moisture within 0～100cm soil depth tends to be stable, but obviously lower than that within the contrast experiment. The suitable distance for planting alfalfa should be more 120?cm away from apricot. Adopting the measures of apricot alfalfa covering system on the slope land converted from farmland may fastly sprout branches, and net income of 7987.5 yuan RMB/hm2 can averagely increased than the planting apricot without overing in 7 years, the average erosion modulus is only 3.06t/hm2. a, which is 53.85% less than that the planting apricot without covering.
|
|
Received: 23 April 2003
|
|
|
|
|
|
|
