| 徐俊华.荒漠草原豆科与禾本科牧草光合特性及产量研究[J].广东农业科学,2014,41(13):17-24 |
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荒漠草原豆科与禾本科牧草光合特性及产量研究 |
| Research on photosynthetic characteristics and yield of Legume and Gramineous forage in desert steppe |
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| DOI： |
| 中文关键词: 荒漠草原 豆科与禾本科 牧草 光合特性 产量 |
| 英文关键词: desert steppe Legume and Gramineous forage photosynthetic characteristics yield |
| 基金项目:/ |
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| 摘要点击次数: 1345 |
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| 中文摘要: |
| 比较分析了荒漠草原豆科与禾本科两科牧草的光合特性、产量及其主要影响因子。结果表明：豆科牧草净光合速率（Pn），蒸腾速率（E），气孔导度（Gs），胞间CO2浓度（Ci）均高于禾本科牧草，两科牧草Pn 日变化均呈单峰型，并且豆科牧草峰值较禾本科牧草晚；豆科牧草E日变化呈双峰曲线，禾本科牧草E日变化呈单峰曲线，豆科牧草Gs，日变化呈单峰曲线，禾本科牧草Gs日变化基本呈下降趋势；两科牧草Ci日变化趋势呈“V”型规律曰豆科牧草叶面积指数（ LAI） 、叶比重（SLW）、叶绿素a/b 值营养成分和产量均高于禾本科牧草，具有更高的光合利用效率和营养价值；豆科牧草根冠比（R/S）高于禾本科牧草，表明豆科牧草倾向于将更多的生物量分配到地下，而禾本科牧草将更多的生物量分配到地上。相关性分析表明，牧草光合特性更多影响其自身营养成分，土壤有机质及其有效成分更多影响牧草产量。综合分析比较，豆科牧草可作为荒漠草原区推广种植的优良牧草。 |
| 英文摘要: |
| The photosynthetic characteristics, yield and the main influence factors of Legume and Gramineous forage in desert steppe were compared and analyzed. The results showed that net photosynthetic rate (Pn), transpiration rate (E),stomatal conductance (Gs), intercellular CO2 concentration (Ci) of Legume forage were higher than those of Gramineousforages. The daily variation of Pn of two kinds of forage were in single-peak curve, and the peak of Legume forage waslater than that of Gramineous forage. The daily variation of E of Legume forage showed bimodal curve, while Gramineousforage showed single-peak curve. The daily variation of Gs of Legume forage showed single-peak curve, Gramineous forageshowed a declining curve. The daily variation of Ci of two kinds of forage were in “V”type. Leaf area index (LAI), specificleaf weight(SLW), chlorophyll a/b, nutrients and yield of Leguminous forage which had higher photosynthetic efficiency and nutritional value were higher than those of Gramineous forage. Root/shoot(R/S) ratio Leguminous forage was higher than that of Gramineous forage, it showed that Leguminous forage allocated more biomass to roots. On the contrary, Gramineous forage allocated more biomass to the ground. Correlation analysis showed that the photosynthetic characteristics of forage influenced nutrients more, while soil organic matter (SOM) and itseffective components influenced herbage yield more in steppe desert. Comprehensive analysis and comparison shows that Leguminous forage can be used as good forage planting on steppe desert. |
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