tailieunhanh - Effects of phosphorus fertilizer on growth, yield and quality of coconut at early reproductive stage under saline intrusion condition in Mekong Delta

The aim of this work was to determine effects of the amount of phosphorus fertilizer and the frequency of application on growth, yield and quality of coconut tree at early reproductive stage under saline intrusion condition. | 18 Trường Đại học Nông Lâm TP. Hồ Chí Minh Effects of phosphorus fertilizer on growth yield and quality of coconut at early reproductive stage under saline intrusion condition in Mekong Delta Tri D. H. Nguyen1 Nong C. Le1 Thu N. Q. Thai1 Thang Q. Luu1 amp Chuong D. X. Nguyen2 1 Research Institute for Oil and Oil Plants Ho Chi Minh City Vietnam 2 Faculty of Agronomy Nong Lam University Ho Chi Minh City Vietnam ARTICLE INFO ABSTRACT Research Paper Coconut palm Cocos nucifera L. is one of the most important oil crops in the tropics. The tree is able to grow well under saline intrusion con- Received July 26 2020 dition. However in the case of high level of salinity for a long period the coconut tree is severely affected resulting in poor growth and yield. Revised August 17 2020 Therefore providing balance and sufficient nutrients would help plants Accepted August 26 2020 tolerate better to unsuitable environment including salinity. Among plant macronutrients phosphorus is considered to help coconut tree have more roots and leaves stimulating flowers formation and fruit setting which lead to improve yields. The aim of this work was to determine effects Keywords of the amount of phosphorus fertilizer and the frequency of application on growth yield and quality of coconut tree at early reproductive stage Coconut tree under saline intrusion condition. Two two-factor experiments were con- Mekong Delta ducted in Binh Dai district Ben Tre province and Tan Phu Dong district Phosphorus fertilizer Tien Giang province where the highest salinity in the dry season reached Saline intrusion and respectively. The treatments of experiments were ar- ranged in split-plot design SPD with three replications. The main plot factor was the frequency of phosphorus fertilizer application 2 and 4 times per year and the sub-plot factor was the amount of phosphorus fertilizer 30 45 60 and 75 kg P2 O5 ha year . The results showed that Corresponding author coconut trees grew best with the