摘要:
在福州北峰进行了2年的印度豇豆、印尼大绿豆生长性状观察与测定,并对这两种牧草的营养成分、产能情况进行分析和估算.结果表明,印尼大绿豆全年产鲜草量为65 800 kg·hm-2,印度豇豆全年产鲜草量为5 700 kg·hm-2;印度豇豆株高明显高于同期生长的印尼大绿豆,但其平均单位高度的生物量却低于印尼大绿豆.印度豇豆的粗蛋白、粗脂肪和可溶性碳水化合物分别为19.37%、3.56%和19.25%,均高于印尼大绿豆的18.10%、3.5%和18.87%,而其纤维素、木质素(3.02%和18.7%)却低于印尼大绿豆(35.32%、18.68%).种植1 hm2印度豇豆和印尼大绿豆每年可分别获得60.77×106 kJ和9.72×106 kJ热能值;扣除人工辅助能的投入后,在福州北峰山地种植豆科牧草的太阳能利用率为0.271%～0.12%.
关键词:
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印度豇豆
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印尼大绿豆
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豆科牧草
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产能
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估算
Abstract:
The growth characteristics of Vigna sinesis Sari Var.(VS)and Phaseolus spp.(P)in Fuzhou Beifeng area were studied for two years.The nutritional components of the two forages were analyzed and their energy-producing capacities were estimated.The annual fresh biomass production of P and VS.were 65800 kg·hm-2 and 54700 kg·hm-2,respectively.The plant height of VS was considerably higher than that of P.at a same growing stage.However,the average biomass production per unit height of VS was significantly lower than P.The crude protein,fat and soluble carbohydrate of VS was 19.37%,3.56% and 19.25%,respectively.They were higher than those of P,which were 18.10%,3.45% and 18.87%,respectively.The total cellulose and lignin contents of VS were lower than those of P(i.e.,34.02% and 18.47% vs.35.32% and18.68%).Planting of 1 hm2 VS and P could annually obtain energy 60.77?106 kJ and 94.72?106 kJ,respectively.After deducting artificial auxiliary energy input,the solar energy utilization rate of growing the leguminous forages in Beifeng hilly land was estimated to be 0.271%-0.412%.
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