| Climate-productivity analysis of artificial grass in different sowing time in arid area of Shiyang River basin |
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| DOI：10.7606/j.issn.1000-7601.2008.06.35 |
| Key Words: artificial grass sowing seeds by stages climate-productivity |
| Author Name | Affiliation | | LIU Mingchun | Arid Meteorological Institute of China Meteorology Administration Key Laboratory of Climatic Change and Disaster Prevention of Gansu Province Open Laboratory of Climatic Chang and Disater Prevertion of China Meteorology Administration,Lanzhou Gansu 730020,China；Wuwei Meteorological Bureau, Wuwei,Gansu 733000,China | | LAN Xiaobo | Wuwei Meteorological Bureau,Wuwei,Gansu 733000,China | | WEI Yuguo | ；Wuwei Meteorological Bureau, Wuwei,Gansu 733000,China | | LIU Huilan | ；Wuwei Meteorological Bureau, Wuwei,Gansu 733000,China | | JIANG Jufang | ；Wuwei Meteorological Bureau, Wuwei,Gansu 733000,China | | MA Xingxiang | ；Wuwei Meteorological Bureau, Wuwei,Gansu 733000,China | | YIN Dong | The Central Meteorological Observatory of Lanzhou,Lanzhou Gansu 730020,China |
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| Abstract: |
| In order to reduce the pressure of water resources in the basin adjustment and optimized agriculture planting structure development grass livestock industry after two years＇ sowing seeds by stages experiment growth and development characteristics yield forming laws and adaptability to climate of the two kinds of grass Medicago sative and Astragalus adsurgens under the condition of artificial planting were determined. The result indicated：（1） The dry matter weight of Medicago sative and Astragalus adsurgens of the second year（2004） in the spring sowing land was higher than in the autumn sowing land increasing the yield by 3505．0kg and 2314．5kg per hm2respectively．（2） The increase of grass dry weight and plant height sowed in spring and in autumn was basically isochronous and the growth key time all appeared in budding and flowering period．In this period dry matter accumulation quantity of Medicago sative and Astragalus adsurgens was respectively 70％ and63％ of the total．（3） The least value which was showed by the ratio between dryness and blueness of two kinds of grass growing on the second year （2004） in spring sowing land and autumn sowing land appeared in flowering period which was also the best time to reap pasture．（4） The grass underground biomass in spring sowing land was better than in autumn sowing land．The grass in spring sowing land was helpful for root system to grow．（5） It was the fitting temperature for pasture to return green that means daily temperature steadily passed5℃ in spring．Under the condition of irrigation pasture dry weight was positively associated with heat factor and the productivity was mainly dependent on heat and the requirement of autumn sowing land and late maturing variety for heat condition was more urgent. |
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