VATHANA SANN1, PAGNASOLEY SIP2, LOAN CHHUM PHITH3
1Georg-August-Universität Göttingen, Institute for Animal Physiology and Animal Nutrition, Germany
2Royal University of Agriculture, Faculty of Agronomy Sciences, Cambodia
3Royal University of Agriculture, Faculty of Animal Science and Veterinary Medicine, Cambodia
Soil fertility degradation among vegetable plantation area in Cambodia is now profound due mainly to the misuse of chemical fertiliser. Lettuce, an important vegetable are planted on the Mekong River basin fertile soil, however the chemical fertiliser is still applied. The animal manure, units of integrated farming system in this area, is by far not properly applied. The objective of this paper is to evaluate the interaction of animal manure and chemical fertiliser on the yield of lettuce. 3*3 factorial experiment with 3 replications were conducted with 3 kinds and 3 levels of fertilisers. Cattle dung (CD) and chicken manure (CM) were applied 0, 8 and tonha whereas urea, the chemical fertiliser (CF) were applied at the level of 30, 60 and 90kg N/ha while P and K were kgha constantly. Single effect of CD improved yield of lettuce significantly, 17.13, 19.33 and [23.79]tonha in responded to 0, 8 and tonha of CD respectively. Highly significant difference off yield of lettuce, 1.31, 21.32 and [25.62]tonha were found as affected by increased level of CM. There were no significant difference among groups applied CF, 19.79, 19.88 and [20.57]tonha of 30, 60 and 90kg N/ha respectively. Dry matter content of lettuce were non-significant difference (7.32%). Single effect of CD increased leave numbers of lettuce significantly, 16.46, 17.88 and [19.22]leavesbush in responded to 0, 8 and tonha of CD respectively. Highly significant difference of leave number of lettuce, 14.43, 18.73 and [20.40]leavesbush were found as affected by increased level of CM. There were no significant difference among groups applied CF, 17.53, 17.84, [18.18]leavesbush of 30, 60 and 90kg N/ha respectively. Interaction effect between CD, CM and CF on yield, dry matter and leave numbers were not found. The use of chemical fertiliser on the Mekong River basin, therefore, is not recommended. Integrated farming system of livestock and vegetable is an approach of utilising efficiently the available resource and diminish the environmental pollution caused by animal manure and chemical fertilisers.
Keywords: Animal manure, chemical fertiliser, lettuce