黄土高原子午岭林区主要林分生态化学计量学特征

doi:10.11849/zrzyxb.20160585

自然资源学报 ›› 2017, Vol. 32 ›› Issue (6): 1043-1052.doi: 10.11849/zrzyxb.20160585

黄土高原子午岭林区主要林分生态化学计量学特征

张海鑫^a, 曾全超^a, 安韶山^{b*, *}, 白雪娟^a, 王宝荣^a

a. 资源环境学院,西北农林科技大学陕西杨凌 712100；
b.西北农林科技大学水土保持研究所,陕西杨凌 712100

收稿日期:2016-06-06 修回日期:2016-08-03 出版日期:2017-06-20 发布日期:2017-06-20
作者简介:张海鑫（1993- ）,女,沈阳人,硕士研究生,研究方向为土壤与植物相互作用机制。E-mail:1309080941@qq.com *通信作者简介：安韶山（1972- ）,男,研究员,研究方向为土壤生态学、水土保持效益评价、流域生态与管理。E-mail: shan@ms.iswc.ac.cn
基金资助:
国家自然科学基金面上项目（41171226）; 水利部公益性行业科研专项经费项目（201501045）; 教育部新世纪优秀人才支持计划（NCET-12-0479）;

Ecological Stoichiometric Characteristics of Main Forest Stands in Ziwuling Forest Region on the Loess Plateau, China

ZHANG Hai-xin^a, ZENG Quan-chao^a, AN Shao-shan^b, BAI Xue-juan^a, WANG Bao-rong^a

a. College of Natural Resources and Environment, Yangling 712100, China;
b. Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China

Received:2016-06-06 Revised:2016-08-03 Online:2017-06-20 Published:2017-06-20
Supported by:
National Natural Science Foundation of China, No. 41171226; MWR Nonprofit Industry Research and Special Project Funds, No. 201501045; New Century Excellent Talents, No. NCET-12-0479.

摘要/Abstract

摘要：

论文以黄土高原子午岭林区4种林分（侧柏、油松、辽东栎、刺槐）的绿叶、凋落物（凋落叶、枯枝、果实）为研究对象,分析其C、N、P含量及化学计量学特征,并计算养分再吸收率,为黄土高原植被恢复建设及人工林合理种植规划提供理论依据。结果显示：植物叶片凋落前N、P均发生营养转移,油松N养分再吸收率最高（44.73%）,刺槐P养分再吸收率最高（41.10%）;刺槐相比于其他3种林分,绿叶C含量（413.94 g·kg^-1）略低,且其4个组分N含量略高于其他林分的相应组分,绿叶、果实P含量相对较高;4种林分的枯枝C∶N、C∶P值最大,碳蓄积功能较强;叶片N∶P值均小于14,表明生长旺盛期林分主要受N限制。油松、刺槐养分再吸收能力强,是黄土高原森林区适宜植被恢复的造林树种。

关键词: 凋落叶, 果实, 枯枝, 绿叶, 生态化学计量学, 养分再吸收率, 子午岭

Abstract:

To analyze carbon (C), nitrogen (N), phosphorus (P) and ecological stoichiometric characteristics in green leaf, litter, dead branch and fruit, four forest stands of different species (Platycladus orientalis, Pinus tabuliformis, Quercus wutaishanica and Robinia pseudoacacia L) in Ziwuling forest area on Loess Plateau were collected. The C, N, P contents and C∶N, C∶P, N∶P ratios were measured, and the variations of them were explored in the four forest stands. The results showed that N, P contents of plant were transferred before plant leaf withering and falling, and the resorption efficiencies of various nutrient elements were different. In this study, the highest resorption efficiency of N nutrient was 44.73% (Pinus tabuliformis), the highest resorption efficiency of P nutrient was 41.10% (Robinia pseudoacacia L), respectively. In addition, in Ziwuling forest area, the C content of green leaf under Robinia pseudoacacia L forest was 413.94 g·kg^-1, which was a little lower than that of other forest stands. However, the N contents of green leaf, litter, dead branch and fruit under Robinia pseudoacacia L forest were 29.74, 17.10, 8.59, and 24.79 g·kg^-1, which were slightly higher than the corresponding components of other forest stands; the P contents of green leaf and fruit under Robinia pseudoacacia L forest were 2.43 and 2.53 g·kg^-1, which were higher than the corresponding components of other forest stands. The carbon accumulation capacities of these four forest stands were large. The resorption efficiencies of Pinus tabuliformis and Robinia pseudoacacia L were greater than that of Quercus wutaishanica and Platycladus orientalis. The C∶N, C∶P and N∶P ratios indicated that C accumulation was strong and that N, P nutrient were restricted by its ecosystem condition. The C∶N, C∶P ratios in dead branch were higher than the ratios in other components of the four species of plants. The N∶P ratios in green leaf of the four forest stands were all smaller than 14, showing that carbon accumulation capacity of dead branch was strong and the growth of the four forest stands were limited by N. This study found that Pinus tabuliformis and Robinia pseudoacacia L were more suitable for forest vegetation restoration on the Loess Plateau, China.

Key words: dead branch, ecological stoichiometry, fruit, green leaf, litter, nutrient resorption efficiency, Ziwuling Mountain

中图分类号:

S718.5

张海鑫, 曾全超, 安韶山, 白雪娟, 王宝荣. 黄土高原子午岭林区主要林分生态化学计量学特征[J]. 自然资源学报, 2017, 32(6): 1043-1052.

ZHANG Hai-xin, ZENG Quan-chao, AN Shao-shan, BAI Xue-juan, WANG Bao-rong. Ecological Stoichiometric Characteristics of Main Forest Stands in Ziwuling Forest Region on the Loess Plateau, China[J]. JOURNAL OF NATURAL RESOURCES, 2017, 32(6): 1043-1052.

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黄土高原子午岭林区主要林分生态化学计量学特征

Ecological Stoichiometric Characteristics of Main Forest Stands in Ziwuling Forest Region on the Loess Plateau, China

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