环洞庭湖区杨树人工林测土配方施肥及其与树体养分的相关性

Formula fertilization by soil testing and its correlation with nutrient content of poplar plantation around Dongting lake region

为探明环洞庭湖区中龄期杨树人工林需肥特性,提高肥料利用率,对7年生的杨树人工林开展了测土配方施肥试验及其养分相关性分析。结果表明:该试验区中龄期杨树树体养分与土壤中多种养分呈极显著相关性;氮、磷、钾肥通过合理配施,对胸径生长量的促进作用显著,树高生长量则差异不大;施肥处理16号(0.6 kg/株氮肥、1.5 kg/株磷肥、0.15 kg/株钾肥),林木平均胸径及树高生长量分别为6.07 cm和5.84 m,相比对照CK增长率分别可增加10.58%和7.11%,综合表现比较理想。

In order to find out the fertilizer characteristics of middle-aged Poplar plantation and improve the utilization rate of fertilizer,the soil formula fertilization test and its nutrient correlation analysis were carried out for the seven year old Poplar plantation around Dongting lake region.The results showed that there was a significant correlation between the nutrient content of Poplar and the soil in the experimental area.By nitrogen,phosphorus and potassium fertilizer beening reasonable matched,the DBH growth promoting effect significantly,while tree height growth difference.The overall performance was ideal to fertilize16(0.6kg/plant nitrogen,1.5kg/plant phosphate,0.15kg/plant potassium),and the average increment of DBH and the height of the tree was6.07cm and5.84m,which increased by10.58and7.11%comparing with the control CK.