摘要
本文探讨了高寒牧区燕麦人工草地的营养物质产量动态、热值动态及其光能转化率。试验结果表明,燕麦草地地上部分的净营养物质产量为粗蛋白质89.63克/m^2,粗脂肪30.33克/m^2,无氮浸出物603.43克/m^2,粗纤维331.80克/m^2,粗灰分75.26克/m^2,钙2.05克/m^2 及磷1.35克/m^2。以能量表示的燕麦草地全草层的净初级生产力为27229KJ/m^2·年,为太阳总辐射的0.654%,其中地上部分为0.548%,地下部分占0.106%;对可见光生理辐射的转化率全草层为1.308%,地上部分为1.098%,地下部分为0.213%;对生长季生理有效辐射转化率全草层为2.083%,地上部分为2.351%,地下部分为0.456%。同时,作者探讨了燕麦草地的适宜刈割期。
The dynamics of the nutrient yields,calorific value and the conversion efficiency for solar energy of oat artificial grassland were discussed in this paper.The net productivity of nutrients of the aboveground were crude
protein 89.63g/m^2,crude fat 30.33g/m^2,nitrogen-free extract 603.43g/m^2,crude ash 75.26g/m^2,calcium 2.05g/m^2 and phosphorus 1.35g/m^2.The net primary producti-vity of the whole sward was 27229.709KJ/m^2 in terms of energy.The conver-sion efficiency for yearly total radiation of the whole sward,the aboveground and the underground were 0.654%,0.548% and 0.106% respectively;for the phy-siological radiation,they were 1.308%,1.098% and 0.213% respectively;and for the photosynthetic available radiation during growing period,they were 2.803%, 2.351% and 0.456% respectively.The optimum harvesting time was suggested.
出处
《草地学报》
CAS
CSCD
1991年第1期106-111,共6页
Acta Agrestia Sinica
关键词
燕麦
人工草地
营养物质
光能转化率
oat artificial grassland
nutrients
conversion efficiency for solar radiation
