Sugarcane production is mainly slope cultivation, so soil erosion was serious. The results showed that the different coverage methods have a higher production rate of 39.26%-41.22%, than the control treatment （blank...Sugarcane production is mainly slope cultivation, so soil erosion was serious. The results showed that the different coverage methods have a higher production rate of 39.26%-41.22%, than the control treatment （blank） without covering, so yield-increasing effect was significant. As annual rainfall is around 1,250 mm and the control treatment（blank） without covering, the whole year of fertilizer runoff was 175 mm, the average soil content of runoff water was 2.22 g/L, and the total amount of soil loss was 3585.0 kg/ha. The treatment with farmer fertilization practice ＋ plastic film mulching annual runoff water was 153 mm, the average soil content of runoff water was 2.30 g/L, and the total soil loss of volume was 3183.0 kg/ha. The treatment with optimize fertilization ＋ plastic film mulching annual runoff water was 141mm, the average soil content of runoff water was 2.42 g/L, and the total amount of soil loss was 2958.0 kg/ha. Sugarcane leaves covered treatment runoff did not occur throughout the year. The coverage of treatment compared with the control treatment, runoff water reduction is in the range of 12.6-16.0%, is 15.8-23.8% reduction in the amount of runoff soil. Treatment with no fertilization nutrient N loss was 5.760 kg/ha, and P205 loss was 2.565 kg/ha in runoff water. Farmer fertilization treatments the nutrient N loss was 12.435 kg/ha, and the loss P205 was mulching treatment nutrient N loss was 7.755 kg/ha, and P205 loss was 3.960 kg/ha in water runoff. Optimizing fertilization ＋ plastic 3.540 kg/ha in runoff water.展开更多
Despite being in arid and semi-arid areas,erosion is largely a result of infrequent but heavy rainfall events; therefore,rainfall erosivity data can be used as an indicator of potential erosion risks.The purpose of th...Despite being in arid and semi-arid areas,erosion is largely a result of infrequent but heavy rainfall events; therefore,rainfall erosivity data can be used as an indicator of potential erosion risks.The purpose of this study was to investigate the spatial distribution of annual rainfall erosivity in North Jordan.A simplified procedure was used to correlate erosivity factor R values in both the universal soil loss equation (USLE) and the revised universal soil loss equation (RUSLE) with annual rainfall amount or modified Fournier index (F mod ).Pluviometric data recorded at 18 weather stations covering North Jordan were used to predict R values.The annual values of erosivity ranged between 86-779 MJ mm ha ?1 h ?1 year ?1 .The northwest regions of Jordan showed the highest annual erosivity values,while the northeastern regions showed the lowest annual erosivity values.展开更多
文摘Sugarcane production is mainly slope cultivation, so soil erosion was serious. The results showed that the different coverage methods have a higher production rate of 39.26%-41.22%, than the control treatment （blank） without covering, so yield-increasing effect was significant. As annual rainfall is around 1,250 mm and the control treatment（blank） without covering, the whole year of fertilizer runoff was 175 mm, the average soil content of runoff water was 2.22 g/L, and the total amount of soil loss was 3585.0 kg/ha. The treatment with farmer fertilization practice ＋ plastic film mulching annual runoff water was 153 mm, the average soil content of runoff water was 2.30 g/L, and the total soil loss of volume was 3183.0 kg/ha. The treatment with optimize fertilization ＋ plastic film mulching annual runoff water was 141mm, the average soil content of runoff water was 2.42 g/L, and the total amount of soil loss was 2958.0 kg/ha. Sugarcane leaves covered treatment runoff did not occur throughout the year. The coverage of treatment compared with the control treatment, runoff water reduction is in the range of 12.6-16.0%, is 15.8-23.8% reduction in the amount of runoff soil. Treatment with no fertilization nutrient N loss was 5.760 kg/ha, and P205 loss was 2.565 kg/ha in runoff water. Farmer fertilization treatments the nutrient N loss was 12.435 kg/ha, and the loss P205 was mulching treatment nutrient N loss was 7.755 kg/ha, and P205 loss was 3.960 kg/ha in water runoff. Optimizing fertilization ＋ plastic 3.540 kg/ha in runoff water.
基金Supported by the Deanship of Research, Jordan University of Science and Technology (No. 91/2004)
文摘Despite being in arid and semi-arid areas,erosion is largely a result of infrequent but heavy rainfall events; therefore,rainfall erosivity data can be used as an indicator of potential erosion risks.The purpose of this study was to investigate the spatial distribution of annual rainfall erosivity in North Jordan.A simplified procedure was used to correlate erosivity factor R values in both the universal soil loss equation (USLE) and the revised universal soil loss equation (RUSLE) with annual rainfall amount or modified Fournier index (F mod ).Pluviometric data recorded at 18 weather stations covering North Jordan were used to predict R values.The annual values of erosivity ranged between 86-779 MJ mm ha ?1 h ?1 year ?1 .The northwest regions of Jordan showed the highest annual erosivity values,while the northeastern regions showed the lowest annual erosivity values.
