The best combination is base manure proportion and the times of after manure 2/5 +5times + 521 lhole/667m2 + pure nitrogen 15kg/667 m2 + pure potassium 12kg/ 667m2.

• 最优组合是基肥比例及追肥次数2/5+5次+5211 株/667 m2+纯氮15kg/667 m2+纯钾12kg/667 m2。