东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2010年
3期
17-19,22
,共4页
三倍体毛白杨%季节动态%营养元素%能量
三倍體毛白楊%季節動態%營養元素%能量
삼배체모백양%계절동태%영양원소%능량
Triploid Populus tomentosa%Seasonal dynamics%Nutrient elements%Energy
2008年3月至2009年3月,对不同林龄(3a、5a、6a、7a)的三倍体毛白杨纸浆林地上凋落物动态变化进行分析研究.结果表明,不同林龄林分的凋落物量随林龄的增加而增加,全年凋落物总量为(216.03±59.73)～(482.38±101.34)g·m~(-2)·a~(-1);凋落物的月动态变化表现为单峰曲线,最大凋落量出现在10月份;通过凋落物归还林地的N、P量及能量均随林龄的增加而增加,表现出与凋落物量相同的月动态规律.由凋落物归还的N为1.84～2.89 g·m~(-2)·a~(-1),归还的P为0.58～1.17 g·m~(-2)·a~(-1),归还到林地的能量为3.96×10~6～8.89×10~6J·m~(-2)·a~(-1).
2008年3月至2009年3月,對不同林齡(3a、5a、6a、7a)的三倍體毛白楊紙漿林地上凋落物動態變化進行分析研究.結果錶明,不同林齡林分的凋落物量隨林齡的增加而增加,全年凋落物總量為(216.03±59.73)～(482.38±101.34)g·m~(-2)·a~(-1);凋落物的月動態變化錶現為單峰麯線,最大凋落量齣現在10月份;通過凋落物歸還林地的N、P量及能量均隨林齡的增加而增加,錶現齣與凋落物量相同的月動態規律.由凋落物歸還的N為1.84～2.89 g·m~(-2)·a~(-1),歸還的P為0.58～1.17 g·m~(-2)·a~(-1),歸還到林地的能量為3.96×10~6～8.89×10~6J·m~(-2)·a~(-1).
2008년3월지2009년3월,대불동림령(3a、5a、6a、7a)적삼배체모백양지장임지상조락물동태변화진행분석연구.결과표명,불동림령림분적조락물량수림령적증가이증가,전년조락물총량위(216.03±59.73)～(482.38±101.34)g·m~(-2)·a~(-1);조락물적월동태변화표현위단봉곡선,최대조락량출현재10월빈;통과조락물귀환임지적N、P량급능량균수림령적증가이증가,표현출여조락물량상동적월동태규률.유조락물귀환적N위1.84～2.89 g·m~(-2)·a~(-1),귀환적P위0.58～1.17 g·m~(-2)·a~(-1),귀환도임지적능량위3.96×10~6～8.89×10~6J·m~(-2)·a~(-1).
Seasonal dynamic changes of litterfall in triploid Populus tomentosa pulp plantations of four different ages were studied from April 2008 to March 2009. Results showed that the total amount of literfall per square meter per year increased with forest age, ranging from (216.03±59.73) gram in three-year-old forest to (482.38±101.34) gram in seven-year-old forest. The dynamic change of litterfall in different months exhibited a unimodal curve, and the maximum value was observed in October. Total amounts of N, P and energy returned to the forest floor via litterfall also increased with age. The total amount of N returned to forest floor per square meter per year ranged from 1.84 to 2.89 gram, that of P from 0.58 to 1.17 gram, and the energy from 3.96 to 8.89 MJ.
