摘要
叶重、茎重、叶茎比及株高是沙打旺重要的形态学指数。通过盆栽试验，研究了这些形态学指数与产草量的关系，并分析了水肥对这些形态学指数的影响。结果表明：随叶重增加产草量呈幂函数提高；茎重与产草量呈正比关系；随产草量提高叶茎比按负幂函数降低。株高随时间变化呈逻辑斯谛曲线，水肥对沙打旺株高、茎重及叶重呈显著正效应，尤以水分效应显著。
Leaf weight,stak weigh,leafand stakweight ratio and heigth of Astragalus Adsurgensall are morphologically important characteres of its above-ground part.It has been studied that therelationship bewteen those characteres and its forage yeild,as well as impacting of soil moisture andfertilizing amount on those characteres with the plot experiement.The resultes show as following:The grass yeild increases with leaf weight as the power function:The grass yeild is directly proportion to its stalk weight. The ratio of grass leaf and stalk weight decreases with its grass mass as negtive power func-tion.The changes of its heigth with time can be very good fitted to the Logistic equation. The effectof soil moisture and fertilizing amount on heigth,stalk weight and leaf weight are all excielentlypositive, which moisture effect is greater than that of fertilizing amount.
出处
《水土保持通报》
CSCD
北大核心
1995年第1期23-28,共6页
Bulletin of Soil and Water Conservation
关键词
牧草
沙打旺
形态指数
产草量
施肥量
Astragalus Adsurgens Morphological character Soil moisture ferilizing amounr
