In the single planting alfalfa, Hayyield of alfalfa has negative influence on available K.
而在单播的紫花苜蓿中，紫花苜蓿的干草产量与速效K呈负相关。
2
The species of alfalfa thrips in China and the symptom by its imperiling were reported. The hayyield of alfalfa loses 20.1 percent by this infection.
本文报道了我国苜蓿蓟马的种类、蓟马危害的症状、因蓟马危害造成苜蓿干草产量损失达20.1%。
3
The hay production and nutrition of rye in different development stage, and the effect of harvest times and date on the hayyield and quality had been studied.