Abstract:
Ecological structure and function of 5 optimized models in newly built orchard in uncultivated slopping field are analyzed.The results show that organic matter increases by 5%~20%,total N increases by 7%~ 40%.total P increases by 8%~ 70%and total K increases by 15% ~ 80% every year.Good patterns in water and soil retaining are peanut-au-tumn soybean,spring so ybean-autumn soybean, tomato-chinese cabbage, and cayenne-tomato,the soil average erosion module and runoff amount decrease respectively by 44.19%,38.24%,39.52%,37.56%and 22.40%,9.28%,24.11%,and 21.60% compared with CK.Cayenne-tomato is the highest in biomass,the average yearly is 100280kg/hm
2.the second is peanut-autumn soybean,the average yearly is 77030 kg/hm
2.Tomato-chinese cabbage is the highest in prod uctivity,the average yearly is 15390 kg/hm
2,the second is cayenne-tomato,the average yearly is 13800 kg/hm
2.Efficiency of energy introjection in order is cayenne-tomato,peanut-autumn soybean,tomato-chinese cabbage,spring soy-bean-autumn soybean,drought rice-red turnip.The averages of their total energy output/input ratios yearly are 2.96,2.08,2.01,2.O0,and 0.96.