摘要
本文基于牧草生产的需要,对生活第2年、第3年红豆草(Onobrychis viciaefolia)的地上生物量、能量积累、营养成分含量及茎、叶、花序(籽实)重量比的变化动态进行了试验探讨,结果表明:(1)单位面积上红豆草地上生物量的变化规律大体可分为缓慢、快速、较快增长期和较慢下降期四个阶段,且生物量的高峰值出现在结荚期。(2)红豆草从分枝到成熟,其能值由每公斤干物质16.817兆焦耳增至18.903兆焦耳;单位面积上干物质的能值在每亩2921.1～13378.4兆焦耳之间,且最大能值出现在结荚期。(3)红豆草在不同生育期,其干物质含粗蛋白质变化较大(13.58～14.75％),若以单位重量计,分枝期的粗蛋白含量最高,为24.75％;若以单位面积计,结荚期的粗蛋白由产量最高,达113.5公斤/亩,是分枝期43公斤/亩的2.64倍。
Dynamics of aboveground biomass,energy accumulation,and nutrient contents of Onobrychis viciaefolia was monitered for the second and third year growth period.The results are:(1)changes of aboveground biomass have four distinct phases:slow mcrease,fast increase Jess fast mcrease and slow decline,and the peak biomass appeared at pod stage. (2)From branching to maturity,energg accumulation for lkg biomass wao from 16.817 MJ to 18.903 MJ,energg value of biomass on 1 mu(l / 15ha) ranged from2921.1 MJ to 13378.4 MJ,and the peak energy value also occurred at pod formation. (3)At different developmental stages,the crude protein content of the biomass varied significantly (13.58～24.75%).On unit weight basis,crude protein contentat branching was the highest (24.75%),on unit arca basis,crude protein production at pod stage was the highest,reaching 113.5kg / mu which was 2.64 fold of that at branching period.
出处
《草业科学》
CAS
CSCD
北大核心
1990年第5期41-46,共6页
Pratacultural Science
关键词
红豆草
地上生物量
粗蛋白
能值
Onobrychis
viciaefolia
aboveground biomass
energy vaeue
crude protein
