Võ Thị Gương, Trần Thị Phụng Kiều (trang 71-74)
Từ khoá: canh tác, dưa hấu, đất phèn, Đồng bằng sông Cửu Long
Cultivation of water melon on severely acid sulfate soils in the Mekong delta
3 consecutive crops were executed arranging in treatments f local lime and Agri-Stabi, a new production of lime material. Residual effect of lime was tested at the 2nd and the 3rd crop. Some selected chemical soil properties were measured. Fruit yield was recorded and economic efficiency was evaluated. In the 1st crop, water melon could not survive without supply of line although sufficient of nutrients N, P, K. local lime and Agri-Stabi give very positive effect on increasing soil pH, reducing Al exchangeable, improving growth in maintain fruit yield significant higher in comparison with the control. After 3crops, fruit yield was improved, Al in soils gradually declined due to leaching acidity. However, lime application and residual effect give highest production and profit after 3 crops. Therefore, in severely acid sulfate soil, water melon can growth and give high fruit yield, high benefit if liming of 2 tons/ha ins done in the condition of sufficient major nutrients.