Md. Sydur Rahman
Scientific Officer
IWM Division, BARI, Gazipur
M. A. Razzaque Akanda
Senior Scientific Officer
IWM Division, BARI, Gazipur
IWM Division, BARI, Gazipur
Md. Anower Hossain
Scientific Officer
Division, BARI, Gazipur
The study was conducted at the farmers' field of village Paragaon, Harinal of Gazipur district to determine the effect of irrigation as well as to identify the critical stages for irrigation and quality on yield and yield parameters of litchi during 2005-2006 and 2006-2007. The yield contributing characters varied significantly among the irrigation treatments.The yield trends for all the years was somewhat similar.The highest litchi yield (35.62 & 42.26 kg/tree) during 2005-2006 and 2006-2007, respectively, as well as the annual economic return (Tk. 3442.00 and Tk. 4395.00 per/tree) were obtained from the treatment irrigated at 15 days interval. The lowest yield and annual return were found from non-irrigated tree (control) during all the study years.The number of fruits and unit fruit weight were higher in irrigated trees than that of non-irrigated trees. It might be due to sufficient moisture at the root zone during flowering and fruit setting stages.
Litchi, Irrigation, critical growth stages, economic return, fruit weight
Paragaon,Gazipur
Crop-Soil-Water Management
The study was undertaken at the farmers' field of Harinal, Gazipur to determine the effect of irrigation amount and timing on the yield and quality of litchi.
The experiment was conducted on 10-15 years old bearing litchi trees (local variety) at the village, Paragaon, Harinal, District Gazipur. Eighteen trees was selected for the study. Fertilizer were applied on 2 November, 2006 at the rate of 30 kg cow dung, 1.1 gm urea, 1.5 gm TSP and 1.0 kg MP per tree. A common irrigation was applied just after the application of fertilizer. The experiment was designed with the following treatment combinations.
T1 = Control (No irrigation)
T2 = One irrigation before flowering stage
T3 = One irrigation at flowering stage
T4 = Two irrigations at flowering and fruit setting stage
T5 = Irrigation at 15 days interval (from flowering to fruit maturity)
T6 = Irrigation at 7 days interval (from flowering to fruit maturity)
Irrigation was started on 15 January 2006. Measured amount of water was applied during each irrigation. Irrigation was applied through polythene hose pipes in ring basin method from the nearby shallow tube well. First spray (omits) was applied at flowering stage and second spray (omit+tilt+sythrin) was applied at fruit setting stage. Number of cracked fruit, number of fruits/plant, fruit length, fruit diameter, unit fruit weight and yields per plant were collected. Fruits from all treatments were harvested up to 2 June 2006. Other observations on fruit quality characteristics were recorded using standard procedures. Fifty fruits from each selected tree were collected for data collection.
Annual Research Report 2006-2007, IWM, BARI
From two years study it is observed that the highest fruit yields of litchis can be obtained in Gazipur soil and climate by applying 7 to 8 irrigations at 15 days interval from flowering to the fruit maturity stages.
Report/Proceedings