COMPARATIVE PHOTOSYNTHETIC RESPONSES OF BIG BLUESTEM TO CLIPPING VERSUS GRAZING

被引：42

作者：

WALLACE, LL

机构：

来源：

JOURNAL OF RANGE MANAGEMENT | 1990年 / 43卷 / 01期

关键词：

D O I：

10.2307/3899122

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The gas exchange responses of Andropogon gerardii were followed after defoliation by either cattle grazing or clipping and compared with the response of nondefoliated plants. Grazed plants had significantly higher rates of photosynthesis than either clipped or control plants. The photosynthesis/transpiration ratio as well as stomatal sensitivity to humidity indicate that leaves of grazed plants may have developed in a higher light and lower moisture environment than that of their clipped counterparts. Microenvironmental differences caused by grazing may be crucial in determining the responses of grasses to clipping versus grazing. -from Author

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页码：58 / 61

页数：4

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