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青藏高原东部高寒草甸群落生物量和补偿能力对施肥与刈割的响应
引用本文:马涛,武高林,何彦龙,文淑均,何俊龄,刘锦霞,杜国祯.青藏高原东部高寒草甸群落生物量和补偿能力对施肥与刈割的响应[J].生态学报,2007,27(6):2288-2293.
作者姓名:马涛  武高林  何彦龙  文淑均  何俊龄  刘锦霞  杜国祯
作者单位:1. 兰州大学干旱农业生态教育部重点实验室,兰州,730000
2. 兰州大学干旱农业生态教育部重点实验室,兰州,730000;兰州大学草地农业科技学院,兰州,730000
3. 兰州大学草地农业科技学院,兰州,730000
4. 宁夏环境科学设计研究院,银川,750004
摘    要:以青藏高原东部高寒草甸群落为研究对象,通过比较了不同施肥条件和不同刈割对群落地上生物量和多样性的影响。结果表明施肥可提高生物量且生物多样性降低,施肥和刈割处理后,施肥效应显著而刈割效应不显著,说明施肥是主效应。实验还发现施肥可提高群落的补偿能力;不同资源梯度的情况下植物群落对刈割处理后补偿作用也不相同,对刈割处理后植物群落补偿能力随资源的升高而增强。当未施肥和施肥30g/m^2时相同强度的1次刈割的补偿能力较相同强度的2次刈割的补偿能力大;当施肥60g/m^2和120g/m^2时相同强度的2次刈割的补偿能力较相同强度的1次刈割的补偿能力大。

关 键 词:施肥  生物量  刈割  补偿效应
文章编号:1000-0933(2007)06-2288-06
收稿时间:2006/6/27 0:00:00
修稿时间:2006-06-272006-11-28

The effect of simulated mowing of the fertilizing level on commuity production and compensatory responses on the Qinghai-Tibetan
MA Tao,WU Gaolin,HE Yanlong,WEN Shujun,HE Junling,LIU Jinxia and DU Guozhen.The effect of simulated mowing of the fertilizing level on commuity production and compensatory responses on the Qinghai-Tibetan[J].Acta Ecologica Sinica,2007,27(6):2288-2293.
Authors:MA Tao  WU Gaolin  HE Yanlong  WEN Shujun  HE Junling  LIU Jinxia and DU Guozhen
Affiliation:1. Key Laboratory of Arid Agroecology of Ministry of Education, Lanzhou University, Lanzhou 730000, China; 2 .College of Pastoral Agricultural Science and Technology of Lanzhou university, Gansu Lanzhou, 730000 ;3. Ningxia Research and Designing Institute of Environmental Science, Ningxia Yinchuang 750004, China
Abstract:Understanding the effects of mowing and fertilizer on pasture land is critical for effective management. This study, at the Pasture Land Station of Maqu in southern Gansu, examined the effects of 4 fertilizer addition levels and 6 mowing intensities on community structure and plant aboveground biomass. Our result showed that species richness decreased along fertilizing gradients, and the soil fertility treatments significantly affected aboveground biomass, with 30g/m2(NH4) 2HPO4 resulting in the highest levels of aboveground biomass. The mowing treatment did not significantly affect aboveground biomass. The soil fertility and mowing treatments significantly affected community compensation ability. These results indicated that community compensation ability was directly related to the soil fertility levels, so that fertilizer can enhanced community compensation. Different fertilizer levels and mowing treatments had different effects on compensatory responseswith compensation ablity increasing along fertilizing gradients. The least fertile soil and 30g/m2(NH4)2HPO4 with one mowing event had a compensation ability two times greater than other treatment combinations. The 60g/m2(NH4)2HPO4 soil fertility treatment and 120g/m2(NH4)2HPO4 with two mowing events resulted in lower compensation ability.
Keywords:fertilizing  biomass  mowing  compensatory responses
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