关键词: 富集, 富集

Abstract: To discuss the hickory forest soil nutrient and the variety regularity of pecan’s production under different vegetations artificial recovery mode, analysis of the pecan soil nutrients in the typical stands was made after 5 years of artificial vegetation planting in Xianxia Town, Ningguo where the area was serious ecological degenerated. The results showed that: the value of different vegetation restoration on soil pH was 4.5-6.5; average potassium content was 0.92 g/kg; average magnesium content was 0.98 g/kg. The low nitrogen content was reflected in 2 modes which were Amorpha planting under hickory forest mode and spray herbicide in hickory forest mode; the high calcium and nitrogen content showed in the white clover planting under hickory forest mode, which was 112.68 g/kg and 66.25 mg/kg. The high moisture content was showed in Hickory bahia grass understory planting pattern which was 17.68%. The highest production was in planting Amorpha mode and the lowest was in herbicide mode. After multiple comparisons, among different business modes in pecan forest, planting Amorpha mode effectively increased production, planting Hickory bahia grass mode was beneficial to the water and soil conservation, the favorable ph of pecan growing was 5.88.