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当前位置: 首页 > 文章 > 秦岭火地塘林区主要森林类型的营养循环 西北林学院学报 1996 (1) 115-120
Position: Home > Articles > Nutrient Cycle in Main Types of Forests at Huoditang Forest Region in the Qinling Mountains Journal of Northwest Forestry University 1996 (1) 115-120

秦岭火地塘林区主要森林类型的营养循环

作  者：
张硕新;雷瑞德;刘广全;党坤良;尚廉斌;张仰渠
单  位：
陕西省林业科学研究所;西北林学院森林资源保护系
关键词：
华山松;油松;锐齿栎;营养循环;地力衰退
摘  要：
在秦岭火地塘林区选取有代表性的华山松（PinusarmandiFranch．）、油松（PinustabulaeformisCarr．）和锐齿栎（Quercusalienavar.acuteserrataMaxim．）林分研究了林木各器官的营养百分含量、林分各组分的养分积累量以及养分收支情况。结果表明：就叶子营养百分含量而言，锐齿栎除叶中K稍低于油松外，其余均高于华山松、油松。油松针叶的P、K、Ca含量高于华山松，而N、Mg的含量正好相反；锐齿栎林林木中Ca的积累量是油松林的4倍多，是华山松林的6倍多；华山松林乔木、枯落物、土壤的营养积累量分别为701．4kg／hm‘、521·gkm／hm’和209220．skin／hm‘，油松林乔木、林下植物、枯落物、土壤的营养积累量分别为840．1kg／hm2、38．4kg／hm2、583．5kg／hm2和27788．0kg／hm2，锐齿栎杜乔木、林下植物、枯落物和土壤的营养积累量分别为2138．7kg／hm2、90．0kg／hm2、159．0kg／hm2和387765．7kg／hm2；各林分的营养归还率锐齿栎林（0．585）＞油松林（0．454）＞华山松林（0．318）；各林分营养吸收量以油松林为最小，这进一步证明油松是一个耐瘠薄树种；锐齿栎林树干和树皮的营养积累量占整个树体营养的67％，而华山松林和油松林仅为28％和24％，由此可见，锐齿栎林树干和树皮中营养所占比例大可能?
译  名：
Nutrient Cycle in Main Types of Forests at Huoditang Forest Region in the Qinling Mountains
作  者：
Zhang Shuoxin; Lei Ruide; Liu Guangquan;Dang Kunliang ;Shang Lianbin; Zhang Yangqu (Dept. of Forest Resowsces Protectuon, NWFC -Yangling, Shaanxi 712100)
关键词：
Armand pine; Chinese pine;sharptooth oak; nutrient cycle; soil fertility decline
摘  要：
Representative stands of Armand pine(Pinus armndi Franch. ), Chinese pine(Pinus tabulaeformis Carr. ) and shaiptouth oak (Quercus aliena var. acutesrrata Maxim. ) at Huodi-tang forest region in the Qinling Mountains were selected to determine nutrient percentage con-tents in organs of the trees, nutrient accunlulation contents in different components of the stands and nutrient revenue and expenditure of the stands. In regard to the nutrient percentage contents in loliage, those of all determlned elements in sharptooth oak leaves were higher than those in Armand plne and Chinese pine needles except for K, the contents of K in sharptooth oak leaves were slightly lower tnan those in Chinese pine needles. The contents of P, K, Ca in Chinese pine needles were higher chan those in Armand pine ones, contrary situation however existed in those of N and Mg; the nuxient accumulation content of Ca in the Sharptooth oak stand was six times more than that in the Armand pine stand and four times more than that in the Chinese pine stand. The nutnt accumulation contents in trees, litter and soil of the Armand pine stand were 701. 4kg/hm2, 52 169kg/hm2 and 209 220. 5kg/hm2 respectively, however those in trees, under-growth, litter and soil of the Chinese plne stand were 840. 1kg/hm2, 38. 4kg/hm2, 583- 5kg/hmz and 27 788. 0kg/hm2 reLpectively, while those of the sharptooth oak stand 2 138. 7kg/hm2,90. 0kg/hm2, 159. 0kg/hm2 and 387 765. 7kg/hm2 respectively; the return rate in the sharp-tooth oak stand was V. 585, in the Chirlese pine stand 0. 453 and in the Armand pine stand 0. 318; among the three stands the uptake capacity of the Chinese forest was minimum, which verified further that Chiriese pine is a barren tolerance specie; the nutrient accumulation contents in stem and bark of the sharptooth oak stand took 67% of the whole nutrient contents in the trees, whereas those of the Armand pine and Chinese pine stands were only 28% and 24% re-spectively, from this we could draw a conclusion that larger proportion of nutrient accumulation contents in stem and bark of sharptooth oak stand might be a main cause leading to the soil fertility decline in sharptooth stand.

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