Comparison of biomass production, tree allometry and nutrient use efficiency of multipurpose trees grown in woodlot and silvopastoral experiments in Kerala, India
Comparison of biomass production, tree allometry and nutrient use efficiency of multipurpose trees grown in woodlot and silvopastoral experiments in Kerala, India
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DOI：
10.1016/s0378-1127(98)00325-9
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发表时间：
1998-12-14
影响因子：
3.7
通讯作者：
Suresh, TK
中科院分区：
文献类型：
--
作者：
Kumar, BM;George, SJ;Suresh, TK
在涉及总共三个年龄序列的林地和林地实验中，评估了多用途树木的生物量积累和养分积累速率。试验共设9个多功能林分（大叶相思、臭椿、菠萝蜜、毛菠萝蜜、木麻黄、余甘子、银合欢等）。K8，Paraserianthes falcataria和Pterocarpus marsupium）和森林牧草实验涉及四种树木（Acacia auriculiformis，Ailanthus triphysa，木麻黄木麻黄和Leucaena leucocephala cv. K8）。这两个种植区均位于印度喀拉拉邦的Thiruvazhamkunnu。林地实验中的树木在8.8岁时被砍伐（部分），而森林牧场实验中的树木在5岁和7岁时被砍伐。生物量积累和养分积累速率以金合欢最高，银合欢最低。地上生物量与胸径和/或总高的异速生长关系给出了合理的预测。种间和种内组织类型间的比较表明，N、P和K的养分利用效率差异很大。养分出口的网站，通过整个树木采伐系统，涉及快速增长的多用途树种的影响进行了讨论。(C)1998 Elsevier Science B. V.保留所有权利。
In woodlot and silvopasture experiments involving a total of three age-sequences, the rates of biomass accumulation and nutrient accumulation by multipurpose trees were evaluated. The woodlot experiment included nine multipurpose trees (Acacia auriculiformis, Ailanthus triphysa, Artocarpus heterophyllus, Artocarpus hirsutus, Casuarina equisetifolia, Emblica officinalis, Leucaena leucocephala cv. K8, Paraserianthes falcataria and Pterocarpus marsupium) and the silvopastoral experiment involved a subset of four trees (Acacia auriculiformis, Ailanthus triphysa, Casuarina equisetifolia and Leucaena leucocephala cv. K8). Both plantings were maintained at Thiruvazhamkunnu, Kerala, India. Trees in the woodlot experiment were felled (partially) at 8.8 years of age and that of the silvopastoral experiment both at 5 years and 7 years of age. Rate of biomass accumulation and nutrient accumulation was highest for Acacia and the least for Leucaena. Allometric relationships linking above ground biomass with DBH and/or total height gave reasonable predictions, A comparison between species and among tissue types within species indicated that nutrient use efficiency for N, P and K varied widely. Implications for nutrient export from the site through whole tree harvesting systems involving fast growing multipurpose tree species are discussed. (C) 1998 Elsevier Science B.V. All rights reserved.