不同氮、钾水平对花生农艺性状及产量的影响

采用相同磷肥条件下,氮肥三水平、钾肥两水平的随机区组设计,研究氮、钾肥之间的相关性及对花生农艺性状和产量的影响。结果表明,在666.7m2基施磷肥(P2O5)15 kg的基础上施氮(纯N)20 kg、钾(K2O)20 kg的高氮高钾处理(N20K20)产量最高,其次是中氮高钾(N15K20)处理;中氮高钾(N15K20)配合有利于荚果的发育,饱果数增加,秕果数和烂果数减少,并提高群体的抗倒伏能力。氮磷利用的协同性大于氮钾的协同性,磷钾的协同性大于氮钾的协同性;三者与产量的相关性依次为:钾最高,磷次之,氮最低。

Effects of Different Nitrogen and Potassium Levels on Agronomic Characters and Yield of Peanut

In order to verify the correlation between nitrogen and potassium fertilizers and their effects on peanut yield and agronomic characters , the random block design with three levels of nitrogen and two levels of potassium was conducted at the same level of phosphate fertilizer .The results showed that based on the basal application of 15 kg P2 O5 per 666.7m2 , the peanut yield reached the highest under the treatment of fertilizing N 20 kg and K2 O 20 kg （ N20 K20 ） , and then the treatment of N 15 K20 .The N15 K20 treatment was benefit to pod development , increase of pod number , decrease of immature and rotted pod number , and increase of popula-tion resistance to lodging .The cooperativity of nitrogen and phosphorus was higher than that of nitrogen and potassium , and also that of phosphorus and potassium .Potassium had the highest correlation with yield , fol-lowed by phosphorus and nitrogen .