varietal level 中文意思是什麼
varietal level
解釋
品種水平-
An optimum planting density must be employed to get a high yield, depending upon soil condition, varietal tillering ability, fertilizer level, number of plants per hill, and planting season
獲得高產必須採用最適植株密度，視土壤條件、品種分蘗力、肥力水平、每蔸苗數和播種季節而定。 -
However, the declining contribution of varietal improvement since 1997 means that governments should encourage breeders to explore elite germplasm, improve breeding level, and enhance yield so that varietal improvement can contribute greater to rice production
鑒於此，政府應鼓勵育種人員進一步發掘優異種質，提高水稻育種水平，突破目前單產停滯不前的現象，從而更好地為水稻生產服務。
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