干旱区生态环境知识资源中心(Arid): 喀斯特石漠化地区四种牧草光合日变化特征研究

Arid

	喀斯特石漠化地区四种牧草光合日变化特征研究
其他题名	Research on diurnal photosynthetic characteristics of four forage grasses in karst rock desertification areas
	池永宽 1; 熊康宁1 ; 王元素 1; 裴晓红 2; 钟欣梅 1; 张锦华 1
来源期刊	浙江农业学报
ISSN	1004-1524
出版年	2015
卷号	27 期号:4 页码:618-624
中文摘要	利用英国Lcpro+光合仪研究了喀斯特石漠化地区白三叶、高羊茅、菊苣、饲用玉米等4种牧草晴天的光合日变化特征。结果表明:在石漠化地区白三叶、高羊茅、菊苣、饲用玉米的净光合速率日均值分别为10.01,6.23,6.16,7.64 mumol CO_2·m~(-2)·s~(-1);蒸腾速率日均值分别为5.11,5.44,4.35,3.36 mmol H_2O·m~(-2)·s~(-1);日均水分利用效率分别为1.94,0.98,1.40,2.09 mumol CO_2·mmol~(-1) H_2O。白三叶表现出高光合、高蒸腾的特点,其Pn值在4种牧草中最高,蒸腾速率仅次于高羊茅,水分效率稍低于饲用玉米;高羊茅表现出低光合、高蒸腾的特点,水分利用效率最低;菊苣的净光合速率在4种牧草中最低,蒸腾速率和水分利用效率介于其他3种牧草之间;饲用玉米的净光合速率仅次于白三叶,蒸腾速率最低,水分利用效率最高。从牧草应充分利用石漠化地区稀缺的光能和土壤水分的角度考虑,建议饲用玉米同菊苣、白三叶、高羊茅间作套作,以充分利用光能和土壤水分,增加土壤N素,提高地表覆盖度,减少水土流失。
英文摘要	The diurnal photosynthetic characteristics of Trifolium repens, Festuca elata, Cichorium intybus and Zea mays in karst rock desertification areas were determined by British Lcpro+photosynthetic instrument on sunny days. Daily mean value of net photosynthetic rate of Trifolium repens, Festuca elata, Cichorium intybus and Zea mays was 10.01, 6.23, 6.16 and 7.64 mumol CO_2·m~(-2)·s~(-1), respectively, the average daily transpiration rate was 5.11, 5.44, 4.35 and 3.36 mmol H_2O·m~(-2)·s~(-1) daily, respectively, and the water-use efficiency was 1.94, 0.98, 1.40 and 2.09 mumol CO_2·mmol~(-1) H_2O. The characteristics of Trifolium repens were high in both photosynthetic and transpiration rate, whose Pn value was the highest in these four forage grasses. Festuca elata exhibited low photosynthetic rate and high transpiration rate, of which the water-use efficiency was the lowest. Net photosynthetic rate of Cichorium intybus was the lowest. Zea mays exhibited the lowest transpiration rate and the highest water-use efficiency, along with a relatively high Pn value. In order to make full use of scarce light energy and soil moisture content in karst rock desertification areas, it was suggested that Zea mays should be intercropped with Cichorium intybus, Trifolium repens and Festuca elata, and soil nitrogen and ground surface coverage could be increased while the water loss and soil erosion would be reduced consequently.
中文关键词	喀斯特 ; 石漠化 ; 人工牧草 ; 光合特性 ; 日变化
英文关键词	karst rock desertification artificial forage photosynthetic characteristics diurnal change
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5430217
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233619
作者单位	1.贵州师范大学中国南方喀斯特研究院, 贵阳, 贵州 550001, 中国; 2.贵州省畜牧兽医研究所, 贵阳, 贵州 550005, 中国
推荐引用方式 GB/T 7714	池永宽,熊康宁,王元素,等. 喀斯特石漠化地区四种牧草光合日变化特征研究[J]. 贵州师范大学,2015,27(4):618-624.
APA	池永宽,熊康宁,王元素,裴晓红,钟欣梅,&张锦华.(2015).喀斯特石漠化地区四种牧草光合日变化特征研究.浙江农业学报,27(4),618-624.
MLA	池永宽,et al."喀斯特石漠化地区四种牧草光合日变化特征研究".浙江农业学报 27.4(2015):618-624.