摘要
本文研究了甘肃省红豆草人工草地地上植物量的动态及其光能转化效率。结果表明:红豆草人工草地在3月21日返青,地上植物量的变化呈单峰曲线,最大值出现在6月29日,为985.83克/米~2干物质;绝对生长率在开花期最高,相对生长率和净同化率从营养期到成熟期逐渐降低。草地对太阳总辐射的转化率为0.306％,对可见光的转化率为0.625％,对生长季有效生理辐射的转化率为0.820％。整个生育期中,草地在开花期对太阳辐射的转化率最高,为1.624％。
The dynamic of aboveground biomass and conversion efficiency of solar radiation in artificial sainfoin grassland in Oansu province were determind. The results obtained were as follows: 1.The artificial sainfoin gassland turned green on March 21. The change of aboveground biomass presented a monopeak curve during 1987 and maximum value was 985. 83g /m^2 DM occured on June 29 and then declined. 2. The maximum absolute growth rate of the artificial sainfoin grassland appeared at blooming stage. While both relative growth rate and net assimilation rate were gradually depressed from nutritional stage to mature stage. 3. The conversion efficiency of total radiation in the artificial sainfoin grassland was 0.306%, On base of physiollogical radiation of visible light the conversion efficiency was 0. 625%, 0. 820% on base of effective physiologic radiation during growing period. The maximum conversion efficiency of total radiation of above ground part occured at blooming stage and reached to 1.624%.
出处
《草业学报》
CSCD
1993年第3期59-64,共6页
Acta Prataculturae Sinica
关键词
红豆草
草地
生长率
光能转化率
Sainfoin grassland, biomass, growth rate, net assimilation rate, conversion efficiency of solar radiation.
