Influence of Different Application Amounts of Potassium Fertilizer on the Dynamics of Nitrogen Nutrition for Soil and Plants in the Jujube Orchards
Year: 2015
Type: article
Abstract: Through taking four-year direct-seeding close-planting jun-jujubes as materials and studying the influence of different application amounts of potassium fertilizer on the dynamics of nitrogen nutrition of soil and plants in jujube orchards, the result shows that different application amounts of potassium fertilizer will reduce soil alkali-hydrolyzable nitrogen content to different degrees.Soil alkali-hydrolyzable nitrogen content in different soil depths is always relatively low at the stage before leaf expansion and relatively high at blossom stage or fruit-set stage.There is an obvious linear negative correlation between the application amount of potassium fertilizer and soil alkali-hydrolyzable nitrogen content in 0-20cm depth at the stage before leaf expansion (r = -0.8769*).The application amount of potassium fertilizer is positively correlated with soil alkali-hydrolyzable nitrogen content in 20-40 cm depth at fruit-set stage remarkably (r = 0.95678*).The application amount of potassium fertilizer is negatively correlated with soil alkali-hydrolyzable nitrogen content in 40-60 cm depth at fruit maturation stage exponentially (r = -0.9835**).Applying 30 kg/667 m 2 of potassium fertilizer is beneficial to the absorption and accumulation of nitrogen in fruit branches before fruit-set stage.With regard to the different organs of jujubes at different growth stages, applying potassium fertilizer appropriately can effectively promote the nitrogen absorption of jujube plants, while applying potassium fertilizer excessively will curb the nitrogen absorption of jujube plants.The application amount of potassium fertilizer is significantly correlated with the nitrogen content in jujube secondary branches at the stage before leaf expansion (r = 0.9823**), obviously correlated with total nitrogen content in roots (r = 0.9673*), positively correlated with jujube leaves and total nitrogen content in roots at blossom stage remarkably (r = 0.9513*, 0.9456*) and notably correlated with total nitrogen content in secondary branches at fruit-set stage (r = 0.9455*).
Source: Biotechnology(Faisalabad)
Authors: Jinhu Zhi, Cuiyun Wu, Heli Wang, Qilin Chen, Qiangqing Zheng, Jiajia Cai
Language: English
Subfield: Food Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2542622970