江西农业大学学报
江西農業大學學報
강서농업대학학보
ACTA AGRICULTURAE UNIVERSITATIS JIANGXIENSIS
2013年
6期
1187-1192
,共6页
章俊霞%刘苑秋%吴春生%昝玉亭%郑吉
章俊霞%劉苑鞦%吳春生%昝玉亭%鄭吉
장준하%류원추%오춘생%잠옥정%정길
枫香人工林%凋落物量%季节动态%凋落物分解速率
楓香人工林%凋落物量%季節動態%凋落物分解速率
풍향인공림%조락물량%계절동태%조락물분해속솔
Liquidambar formosana plantation%litter production%seasonal dynamic change%litter decompo-sition rate
以江西省泰和县退化红壤区为研究区域,对1990年营造的枫香人工林凋落物数量、组成及其季节动态进行了监测;并采取尼龙网袋法,开展凋落叶分解对碳氮磷调控响应的原位模拟研究,旨在理解凋落物养分归还的基本规律。结果表明:枫香人工林年凋落物总量为3772.6~5719.1 kg/hm2,年均凋落物量为4529.02 kg/hm2,变异系数为23.55%。在凋落物组成中,其中叶占绝大部分(93.95%),枝次之(4.58%),皮、花与果很少,仅占1.47%;凋落物的产量表现出明显的季节动态,年内变化是11月份最大,与落叶量一致,表现为单峰型;落枝量较大值出现在3月和8月,表现为双峰型;枫香人工林凋落量的季节变化为冬季>秋季>夏季>春季。第1年的枫香凋落叶分解速率变幅小于第2年的,凋落叶分解高峰出现在2011年7月;凋落叶分解速率季节变化差异显著,两年平均分解速率为0.7634 g/( g· a)。
以江西省泰和縣退化紅壤區為研究區域,對1990年營造的楓香人工林凋落物數量、組成及其季節動態進行瞭鑑測;併採取尼龍網袋法,開展凋落葉分解對碳氮燐調控響應的原位模擬研究,旨在理解凋落物養分歸還的基本規律。結果錶明:楓香人工林年凋落物總量為3772.6~5719.1 kg/hm2,年均凋落物量為4529.02 kg/hm2,變異繫數為23.55%。在凋落物組成中,其中葉佔絕大部分(93.95%),枝次之(4.58%),皮、花與果很少,僅佔1.47%;凋落物的產量錶現齣明顯的季節動態,年內變化是11月份最大,與落葉量一緻,錶現為單峰型;落枝量較大值齣現在3月和8月,錶現為雙峰型;楓香人工林凋落量的季節變化為鼕季>鞦季>夏季>春季。第1年的楓香凋落葉分解速率變幅小于第2年的,凋落葉分解高峰齣現在2011年7月;凋落葉分解速率季節變化差異顯著,兩年平均分解速率為0.7634 g/( g· a)。
이강서성태화현퇴화홍양구위연구구역,대1990년영조적풍향인공림조락물수량、조성급기계절동태진행료감측;병채취니룡망대법,개전조락협분해대탄담린조공향응적원위모의연구,지재리해조락물양분귀환적기본규률。결과표명:풍향인공림년조락물총량위3772.6~5719.1 kg/hm2,년균조락물량위4529.02 kg/hm2,변이계수위23.55%。재조락물조성중,기중협점절대부분(93.95%),지차지(4.58%),피、화여과흔소,부점1.47%;조락물적산량표현출명현적계절동태,년내변화시11월빈최대,여락협량일치,표현위단봉형;락지량교대치출현재3월화8월,표현위쌍봉형;풍향인공림조락량적계절변화위동계>추계>하계>춘계。제1년적풍향조락협분해속솔변폭소우제2년적,조락협분해고봉출현재2011년7월;조락협분해속솔계절변화차이현저,량년평균분해속솔위0.7634 g/( g· a)。
Taking the degraded red soil region in Taihe County of Jiangxi Province as the research area ,a study was carried out to determine the production ,component and seasonal dynamics of litter fall in Liquidam-bar formosana plantation which was established in 1990.With the purpose of understanding the basic law of nu-trient return and the response to global changes of litter ,the method of Nylon mesh bags was used to study the response of litter decomposition to carbon ,nitrogen and phosphorus additions .The results showed that the annu-al litter production ranged from 3 772.6 kg/hm2 to 5 719.1 kg/hm2 with an average of 4 529.02 kg/hm2 , 23.55%of the variation.In the litter production ,93.95%,4.58%,1.47%were occupied by leaves ,branches, flower+fruit+barks.Monthly litter fall production showed obvious seasonal dynamics ,with the peak occurring in November .It was the same as the Monthly leaf litter .The litter production of the branches showed obvious two peaks occurring in March and August ,respectively .The litter production changed in the order of winter>autumn>summer>spring .The litter decomposition rate changed less in the first year thanin the second year .The peak of litter decomposition occurred in July ,2011.There were significant differences in seasonal litter decomposition rate,the mean decomposition rate of the litter was 0.763 4 g/( g· a) .