不同光照质量和刈割强度对小糠草无性繁殖特性的影响

应用生态学报 ›› 2001, Vol. ›› Issue (2): 245-248.

不同光照质量和刈割强度对小糠草无性繁殖特性的影响

汪诗平¹, 万长贵², Ronald E. Sosebee²

1. 中国科学院植物研究所植物数量生态学开放研究实验室, 北京100093;
2. Department of Ra ngeland, Wildlife and Fisheries Management, Texas Tech University, 102B Goddard Buliding, Lubbock, Texas 7940922125, USA

收稿日期:1999-03-15 修回日期:1999-05-06 出版日期:2001-03-25
通讯作者: 汪诗平,男,1964年生,博士,助研,主要从事草原生态、放牧管理、动-植物关系、放牧家畜营养生态和草地畜牧业可持续发展的研究,发表论文50篇,专著2部,译著1本．Email:wangship@public2.east.cn.net
基金资助:
国家自然科学基金重大项目(49790020);国家科委“九五”科技攻关项目(960160101);中国科学院“九五”特支项目(K

Influence of different clipping intensity and R/FR ratio in light radiation on tillering of weeping lovegrass

WANG Shiping¹, WAN Changgui², Ronald E. Sosebee ²

1. Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093;
2. Department of Ra ngeland, Wildlife and Fisheries Management, Texas Tech University, 102B Goddard Buliding, Lubbock, Texas 7940922125, USA

Received:1999-03-15 Revised:1999-05-06 Online:2001-03-25

摘要/Abstract

摘要： 本实验于1996年在美国德克萨斯理工大学草原、野生动物和渔类系的温室和实验室中进行.实验材料均为盆栽小糠草.实验设计为在自然光照下(R/FR=1.1),以不同留茬高度(10、15、20cm和不刈割)作为不同刈割强度;用不同红光/远红光比例(R/FR=1.3和0.7)处理不同刈割强度的小糠草,观测不同处理对小糠草无性繁殖特性的影响.结果表明,小糠草净增蘖数随刈割强度增加而减少;除不刈割处理外,光照质量变化(R/FR的比例)对分蘖性能影响不大.所有刈割强度下都不存在分蘖的补偿性生长效应,但幼叶伸长速度随刈割强度的增大而加快.可以认为小糠草应适度利用,强度利用或不利用均不利于该草生长发育.

Abstract: Pot experiment with weeping lovegrass was conducted laboratory in the Department of Rangeland,Wildlife and Fisheries Management,Texas Tech University in 1996.The plants grown in green house were used to study the effect of different clipping intensities on tillering, and those grown in laboratory were used to study the interaction between different R/FR(red/farred)ratio of the light reaching to the lower strata of the canopy and different clipping intensities on tillering.The results show that increasing clipping intensity decreased the net gain tillers,bt R/FR ratio had no significant effect on tillering,except no clipping treatment.The compensatory growth effect of tillering did not existed at all clipping intensities,but the elongation speed of young leaves quickened with clipping intensities.It is suggested that suitable utilization,intensified utilization and no utilization were all not beneficial to the growth and development of weeping lovegrass.

中图分类号:

S543

汪诗平, 万长贵, Ronald E. Sosebee. 不同光照质量和刈割强度对小糠草无性繁殖特性的影响[J]. 应用生态学报, 2001, (2): 245-248.

WANG Shiping, WAN Changgui, Ronald E. Sosebee . Influence of different clipping intensity and R/FR ratio in light radiation on tillering of weeping lovegrass[J]. Chinese Journal of Applied Ecology, 2001, (2): 245-248.

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