钾及磷钾配施对黑花生生理特性及产量的影响

田间条件下,研究了钾及磷钾配施对黑花生叶片生理特性和产量的影响。结果表明,钾能提高黑花生生育前中期叶片叶绿素含量和光合速率,磷钾配施（中磷120 kg.hm-2＋高钾225 kg.hm-2）效果更为明显。钾肥对提高黑花生叶片SOD和CAT活性、增加可溶性蛋白质含量均有明显作用,但对POD活性影响不大,磷钾配施可显著提高SOD、CAT和POD活性,增加叶片中可溶性蛋白质含量。黑花生对钾的反应大于磷,三个磷水平下荚果产量均以髙钾处理最高,其中低磷髙钾组合显著高于其他处理。

Effects of Potassium Fertilizer and Phosphorus,Potassium Fertilizer Combined Application on Physiological Characteristics and Yield of Black Peanut

In order to study the effects of potassium（K） and phosphorus（P）,K fertilizer combined application on physiological characteristics and yield of Black Peanut,the field experiment was conducted with peanut CV.Heihua NO.1 in the experimental station of Shandong Peanut Research Institute in 2009.The results showed that,K fertilizer had a positive effect on the content of chlorophyll and photosynthetic rate at early and middle stage.Medium level of P fertilizer combined with high level of K fertilizer could significantly increase the content of chlorophyll and photosynthetic rate.K fertilizer could markedly enhance the activities of superoxide dismutase（SOD） and catlase（CAT）,and increased the content of soluble protein.But K fertilizer had no significant effect on the activity of peroxidase（POD）.More sensitive response of black peanut yield to K than P was observed.The yield was higher with high rate of K under three P level,and the treatment combination with rates of low P and high K gave the highest yield among all treatments.