Forest Investigation and Soil Physical and Chemical Properties Analysis of Idesia polycarpa 'Yuji' Plantation Forest

LI Peng-cheng;WANG Yan-mei;REN Jun-zhan;QIAO Wang-tie;LIU Zhen;JIN Chao;LI Zhi;CAI Qi-fei;GENG Xiao-dong;College of Forestry/Henan Agricultural University;Forestry Bureau of Jiyuan Industry City Integration Demonstration Zone;

Idesia polycarpa 'Yuji';;stand investigation;;soil physical and chemical properties

The growth status, tree species composition and soil nutrient content of Idesia polycarpa 'Yuji' forest were analyzed and discussed, to provide reference for sustainable management of soil in I. polycarpa forest land. Taking the 19-year-old I. polycarpa plantation forest in Yugong Forest Farm of Jiyuan City, Henan Province as the research object, the stand composition of I. polycarpa forest was investigated, and the tree height, DBH and height under branches were measured; the soil nutrients under the I. polycarpa forest at different altitudes and different soil depths were analyzed. The results showed that 1) The ratio of female to male of 19-year-old I. polycarpa forest is 3:5, the canopy density is more than0.8, the average tree height is 11.75 m, the height under branches is 6.17 m, and the DBH is 12.79 cm, individual tree growth condition is good, no obvious disease and insect pest. 2) At the same altitude, there was no significant difference in the contents of total C, nitrate N and Organic between different soil depths(P>0.05), but there was significant difference in the contents of available P(P<0.05); the contents of total C, total N, nitrate N, Organic, available P and available K in the same soil depth and at different altitudes were significantly different(P<0.05). The above results indicated that there were differences in soil physical and chemical properties under the I. polycarpa forest at different altitudes and soil depths.Compared with soil depth, altitude had a greater impact on soil nutrients.