NGHIÊN CỨU MỨC TỈA THƯA QUẢ THÍCH HỢP NHẰM NÂNG CAO HIỆU QUẢ SẢN XUẤT CHO CÂY NA (MÃNG CẦU TA) TRÊN VÙNG SẢN XUẤT NHỜ NƯỚC TRỜI Ở ĐÔNG NAM BỘ
NGHIÊN CỨU MỨC TỈA THƯA QUẢ THÍCH HỢP NHẰM NÂNG CAO HIỆU QUẢ SẢN XUẤT CHO CÂY NA (MÃNG CẦU TA) TRÊN VÙNG SẢN XUẤT NHỜ NƯỚC TRỜI Ở ĐÔNG NAM BỘ
Study on appropriate level of fruit thinning for sweetsop (Annona squamosa L.) grown under rainfed condition in the southeast region of Vietnam
The experiment was conducted to define the approriate level of fruit thinning for sweetsop (Annona squamosa L.) grown on grey soil (acrisols) under rainfed condition in the southeast region of Vietnam during two crops of 2009 and 2010. The 5-year sweetsop trees with spacings of 3 x 4 m were fruit-thinned and leaved amount of 60; 50; 40; 30; and 20 fruits per tree and compared with the control non-fruit thinning. Small, damaged or malformed fruits on clusters were thinned to leave one fruit per each. The result revealed that fruit thinning increased significantly size, weight and flesh proportion of fruit. Thinning and leaving amount of 50 fruits per tree was the best in term of the economical profit.