Effect of Potash Application on Growth and Leaf Physiological Characteristics of Qiongzhuea tumidinoda Seedlings
To investigate the effects of potash application on the growth and leaf physiological characteristics of Qiongzhuea tumidinoda seedlings,one-year-old seedlings are used to test the seedling growth indicators by setting the four different application levels of potassium fertilizer(75,150,225,and 300 kg/ha)and no fertilization as the control(CK).The results show that:1)As potassium application increases,the height and ground diameter of Q.tumidinoda seedlings initially increases and then decreases.The best growth is observed at 150 kg/ha,with plant height and ground diameter increasing by 12.4%and 10.3%,respectively,compared to CK;2)When the potash application is at 150 kg/ha,chlorophyll a and b and carotenoid contents are significantly higher than CK by 23.4%,26.2%,and 11.8%,respectively.At 75 and 225 kg/ha,chlorophyll content increases slightly but not significantly;at 300 kg/ha,it decreases compared to CK;and 3)The soluble sugar content is the highest when the potash application is at 225 kg/ha,increasing by 43.6%compared to CK,and the starch content increases with higher potassium application levels.The soluble protein content is the highest at 150 kg/ha,increasing by 6.2%compared to CK.Overall,150 kg/ha is the optimal potassium application for Q.tumidinoda seedling,while higher application levels(225 or 300 kg/ha)have negative effects on seedling growth.
万方数据
维普
