Study On Soil Wind Erosion Situation Of Different Underlying In Ecotone Between Agriculture And Animal Husbandry In Bashang Region Of Hebei

Soil becomes desert as a sort of retrogresss form of soil has become a great problem of entironment and society economy in north area. It badly effects and puzzles the subsistence of this area and the persistence development of society. Contrapose entironment's retrogress in bashang region of Hebei. From 7th Apr. 2005 to 12th May 2005, in gale seaon of bashang region, the wind erosion situation is survived in field by "trap entrapped" and set up the erosion plates methods. The results showed that the erosion is remarkably different in different underlying surfaces. It can offer the theory and technique of prevention and cure the wind erosion.The main results as following:1. In the period of observation, the varieties of day's wind erosion sediment is very different. In bottomland, the erosion of no-tillage land of vegetable is the most, the plough land and the stubble land are the fewest. The wind erosion of the stubble land of naked oats is 2.75 g/m2, it is 11.27% less than CK (plough land), it is not markedness with CK;While the wind erosion of the stubble land of corn is 194.11% more than CK. The wind erosion of the no-tillage of vegetable is very markedness with CK, it is 435.29% more than CK. In girder land, the wind erosion of the plough land and the stubble land of naked oats is the most, the woodland and the grassland's erosion is the fewest. the wind erosion of the plough land is as CK, the wind erosion of stubble land is 16.34% less than CK, it is not markedness with CK;But the erosion of woodland and grassland is very less than CK, their erosion is separately 85.64% and 83.66% less than CK. The wind erosion in bottomland is more than girder land. The wind erosion of plough land in bottomland is 52.96% more than girder land and they are diversity markedness. The wind erosion of the stubble land of naked oats in bottomland is 60.13% more than girder land and they are diversity markedness.2. In the period of observation, the average wind speed of every day changes very much, the average wind speed of every day is plus interfix with the wind erosion.3. The sand transporting quantity of plough land in girder land is most, it is 2.216g, the second is the stubble land of naked oats, and they are not markedness interfix. Wood and grassland's are low, they are 0.825g and 0.885g, they are not markedness interfix. The sand transporting quantity of plough land and stubble land of naked oats are the most in near the earth's surface, Wood and grassland's are collected in 100-150cm, but it is low in near the earth's surface. It explains that the soil grain is wriggle and transition in plough land and stubble land of naked oats' wind erosion. The soil grain is hang shift in wood and grassland's wind erosion.4. The wind corrade of differ underlying surfaces' research express that in bottomland , the erosion of no-tillage of vegetable land is the most, it is 504.02 g/m2, the second is the stubble land of corn and plough land, the stubble land of naked oats. This is consistent withformer result. It sufficiency approve the domino offect of reduce the wind erosion at the stubble land of naked oats and plough land in bottomland. In girder land, expect the woodland is abnormity accretion, etcaeteras is the same current with its corresponding underlying surface.5. Roughness and vegetation coverage is important factor to affect the wind corrade , in bottomland, the roughness of stubble land of naked oats and plough land is great, and both of them are not markedness. The stubble land of corn and no-tillage of vegetable land's roughness is less and they are separately markedness with else three managements. In girder land, the stubble land of naked oats> plough land^ grassland's roughness is greater and they are not markedness each other. Woodland's roughness is the least, because woods cover wind. In bottomland, the vegetation coverage of stubble land of naked oats, the no-tillage of vegetable land's is the least, its vegetation coverage is nought. In girder land, the vegetation coverage of grassland and woodland is more, the plough land's is least. The containing water oftopsoih Soil proportion Soil rigidity are not markedness interfix.6. In wind erosion sediment, slender grain and powder grain's content occupy over 80%. This indicates that remoteness grain which contain abundant nutrition element. In bottomland, wind erosion sediment of plough land's hydrolyze azote is 48.80% more than its corresponding furrow floor's. Stubble land of naked oats's is 47.02% more than its, stubble land of corn's is 76.56% more than its, no-tillage of vegetable land's is 81.57% more than its. In girder land, wind erosion sediment of plough land's is 69.25% more than its corresponding furrow floor's. Stubble land of naked oats's is 84.66% more than its, grassland's is 93.01% more than its, woodland's is 57.45% more than it's. The organic and nutrient in wind erosion is more than in topsoil.