杉木不同生长阶段凋落物持水性与养分储量  

Water Capacity Characteristics and Nutrients Storage of Litter in Different Development Stages of Chinese Fir Plantations

作　　者：张鹏[1] 王新杰[1] 衣晓丹[1] 杨俊玲[1] 高志雄[1] 卢妮妮 张艳[1] 

机构地区：[1]省部共建森林培育与保护教育部重点实验室(北京林业大学),北京100083

出　　处：《东北林业大学学报》2015年第10期58-62,共5页Journal of Northeast Forestry University

基　　金：林业公益性行业科研专项(201004008);中央高校基本科研业务费专项资金资助(BLJD200907)

摘　　要：通过对福建省将乐国有林场不同生长阶段杉木人工林凋落物现存量、持水性能以及养分储存量的测定与计算,得出不同生长阶段的杉木人工林凋落物总储量在4.38~31.73 t/hm^2,成熟林阶段凋落物总储量达到最大值;运用对数函数回归凋落物持水量与浸泡时间之间的关系,呈极显著性;最大持水率在159.50%~200.33%,基本表现为随着林龄的递增而减小;有效拦蓄量变化为4.40~14.33 t/hm^2,成熟林的有效拦蓄量最大;不同生长阶段的杉木凋落物中全氮、全磷和全钾的归还量都是在成熟林期间达到最大。综合杉木不同生长阶段凋落物持水性及养分归还的分析,杉木人工林的适宜釆伐期在成熟林期间,即26~35 a。By analyzing the litter standing crop,we studied the water capacity characteristics and litter nutrients return quantity under different development stage of Chinese fir forests in the national forest farm of Fujian Province. The total reserves of litter in different growing stages of Chinese fir plantation were in 4. 38- 31. 73 t / hm2,and the total litter reserves of mature forest reached the maximum value. We used the logarithmic function to fit the relationship between water holding capacity and the immersion time. The maximum water holding rate was in 159. 50%- 200. 33%,and the basic performance was decreased with the age increase. The variation range of effective interception was in 4. 40- 14. 33 t / hm2,and the mature forest reached maximum. The returns of total N,total P,and total K of fir litter in different growth stages reached the maximum in the mature forest. By analyzing the Chinese fir in different growth stages of litter water holding capacity and nutrient return,the suitable period for harvesting is in 26- 35 years.

关 键 词：将乐国有林场 杉木 凋落物持水性 养分归还 

分 类 号：S791.27[农业科学—林木遗传育种] S718.5[农业科学—林学]