DH32-29尾巨桉机械化施肥生长效应分析

This experiment investigates the growth effect of different reforestation patterns and the impact on soil physicochemical properties for DH32-29 pure eucalyptus forests by using the mechanical strip cultivation reforestation model and traditional reforestation model.Three different treatments were set:planting along the edge of the strip(T1),planting on the inner side of the strip(T2),and traditional reforestation(CK).The analysis revealed that both the diameter at breast height(DBH)and tree height of T1 and T2 were higher than those of CK,with an improvement of 16.35%,12.5%,9.53%,and 6.89%,respectively.The mechanical strip cultivation reforestation model effectively reduced soil bulk density,favored soil loosening,significantly improved the capillary porosity and total porosity of the forest land.In terms of field water capacity at each layer,T1>T2>CK,and the differences were significant.Compared to CK,the field water capacity of T1 in the A layer was higher by 16.88%,in the B layer was higher by 15.46%,and in the C layer was higher by 15.86%.There were significant differences in soil nutrient distribution between strip cultivation and traditional reforestation,with varying ratios among different nutrient contents.The soil loosening intensity of strip cultivation was greater than artificial strip removal,indicating an increased soil porosity and field water capacity to a certain extent.This improved soil permeability,water retention,soil physical properties,and promoted the absorption of nutrients by forest trees,thereby enhancing the wood production of DH32-29 pure eucalyptus plantations.