Effects of Interplanting of Herbage on Soil Nutrient of Non-irrigated Apple Orchard in the Loess Plateau

Authors LI Huike; ZHANG Guangjun; ZHAO Zhengyang; LI Kairong

Journal Acta Horticulturae Sinica , 2007,2:34

Abstract The soil nutrients of interplanting of herbage in apple orchard in Weibei areas in the loess plateau were studied. Results showed that the content of soil organic matter within 60 cm soil layer was increased by 0. 1% in grass family herbage land and by 0. 15% in the pulse family herbage per year respectively. With the progress of growing herbage years, the soil organic matter increased in dept soil layers. The effects of interplanting of herbage on total N, P and K were observed within 40 cm soil layer. Nutrient competition existed between herbage and apple tree within 40 cm soil layer in four years after planting herbage. In the fifth year of herbage growth, the content of total N, P and K increased. The content of total N, P and K appeared ＂S＂ type change in five years. But the content of hydrolytic N, available P and available K within 40 cm soil layer increased. The activated organic P and hydrolytic N were different in lands with various kinds of herbage. The activated organic P in perennial ryegrass land was more effectively than that in white clover land. The hydrolytic N in white clover land increased compared with perennial ryegrass land. With the progress of growing herbage years, fruit output and quality were enhanced.