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当前位置: 首页 > 文章 > 天然林及坡耕地转变为巨桉林后土壤养分含量变化 四川农业大学学报 2010,28 (1) 59-63
Position: Home > Articles > Effects of Conversion of Natural Forest and Slope Farmland to Eucalyptus grandis Plantation on Soil Nutrients Journal of Sichuan Agricultural University 2010,28 (1) 59-63

天然林及坡耕地转变为巨桉林后土壤养分含量变化

作  者：
马晓雪;龚伟;胡庭兴;王景燕;李小平;石薇
单  位：
四川农业大学生态林业工程省级重点实验室
关键词：
天然林;坡耕地;巨桉林;土壤养分
摘  要：
以川西低山区天然林及其人工更新形成的1年生(Ⅰ1)、2年生(Ⅰ2)和3年生(Ⅰ3)巨桉林,坡耕地及其退耕形成的1年生(Ⅱ1)、2年生(Ⅱ2)和3年生(Ⅱ3)巨桉林为对象,研究天然林及坡耕地转变为巨桉人工林后土壤有机质、全氮、碱解氮、有效磷和速效钾含量变化。结果表明:各土壤养分含量均呈现出天然林>Ⅰ1>Ⅰ3>Ⅰ2,坡耕地<Ⅱ1<Ⅱ2<Ⅱ3,0~20 cm土层高于20~40 cm土层。说明天然林转变为巨桉林会造成土壤养分降低,但这种情况可能随着栽种年限的增加有所缓解;同时,坡耕地转变为巨桉林后土壤养分含量随栽种年限的增加而增加。
译  名：
Effects of Conversion of Natural Forest and Slope Farmland to Eucalyptus grandis Plantation on Soil Nutrients
作  者：
MA Xiao-xue,GONG Wei,HU Ting-xing,WANG Jing-yan,LI Xiao-ping,SHI Wei(Sichuan Provincial Key Laboratory of Ecological Forestry Engineering,Sichuan Agricultural University,Yaan 625014,Sichuan,China)
关键词：
natural forest;slope farmland;Eucalyptus grandis plantation;soil nutrients
摘  要：
With the natural forest and its regenerated 1(Ⅰ1)-2(Ⅰ2)-and-3(Ⅰ3)-year-old Eucalyptus grandis plantation,the slope farmland and its converted 1(Ⅱ1)-2(Ⅱ2)-and-3(Ⅱ3) year-old Eucalyptus grandis plantation in low mountains of western Sichuan province as subjects,the paper made a study on the change of the content of such soil nutrients as soil organic matter,total N,hydrolysis N,available P and available K after the natural forests and slope farmlands were converted to Eucalyptus grandis plantation.The results showed that the content of soil organic matter,total N,hydrolysis N,available P and available K was observed higher at 0～20 cm than that at 20～40 cm,and a trend was shown as natural forest >Ⅰ1>Ⅰ3>Ⅰ2,and slope farmland <Ⅱ1<Ⅱ2<Ⅱ3.This indicated that soil nutrient content could be decreased in initial conversion of natural forest to Eucalyptus grandis plantation;however,this trend would be delayed with the increase of plantation years.Meanwhile,conversion of slope farmland to forestland could improve soil nutrient content with the plantation year increasing.

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