提高产量和品质目前人们主要是从品种改良和增施磷、钾及微量元素、选择适当刈割期等方面入手。
Presently, variety improvement, increment in P, K and microelement and selection on suitable cutting period are main methods to improve yield and quality.
因此，茎粗、叶片数可作为紫花苜蓿选种、育种、产草量估测和确定刈割适期的两个主要选择指标。
Therefore, stem diameter and leaf number could be considered as two principal selection indexs for breeding new varieties, evaluating yield and select.
为选择该地区最适宜的刈割期、刈割次数和放牧强度以及放牧次数对群落结构的影响提供理论依据。
It provided a base for selecting proper mowing periods and times, grazing intensity and times to affect community, s structure.
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