The ecological structure and function of the newly built orchard intercropping patterns in the uncultivated sloping field

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／hm²．the second is peanut-autumn soybean，the average yearly is 77030 kg／hm²．Tomato-chinese cabbage is the highest in prod uctivity，the average yearly is 15390 kg／hm²，the second is cayenne-tomato，the average yearly is 13800 kg／hm²．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．