• 1. the planting density: 种植密度

• 1.One of the key factors influencing the output and quality of the Gynostemma pentaphyllum is the planting density.
  选择合理栽植密度是提高绞股蓝产量和质量的技术措施之一。
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• 2.The results show that the average value of tracheid form can not be affected by the planting density through variance analysis .
  结果表明，造林密度对马尾松管胞形态总平均值影响不大，方差分析不显著；
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• 3.Walnut tree is bigger, the planting density is low, such as alfalfa, ryegrass, dwarf crops, grass to care, to promote the production of fertilizer.
  核桃树体较大，定植密度较低，如紫花苜蓿、黑麦草、矮秆农作物等，以草养地，以肥促产。
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