EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON THE YIELD AND NUTRIENT UPTAKE OF BRRI DHAN 28
Date
2008-06
Authors
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Publisher
HAJEE MOHAMMOD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR
Abstract
A field experiment was carried out at the Soil Science Field Laboratory, Hajee
Mohammad Danesh Science and Technology University, Dinajpur during the
boro season of 2008 to study the effect of organic and inorganic fertilizers on
the yield and nutrient uptake of BRRI Dhan 28. The work was laid out in the
randomized complete block design (RCBD) with three replications. There were
fourteen treatment combinations comprising of different levels of
recommended doses of chemical fertilizers and organic manures (cowdung,
poultry manure and mustard oil cake) along with control. Cowdung, poultry
manure and mustard oil cake were applied 10 days before transplantation and
the full doses of TSP, MP, gypsum and zinc sulphate were applied during the
final land preparation. Urea was applied in three equal splits at 7, 30 and 60
DAT. The grain and straw yields as well as the yield contributing
characteristics like plant height, number of tillers hill’, number of effective
tillers hill’, panicle length, number of grains panicle™', number of filled
grains panicle’ and 1000 grain weight were significantly influenced due
to different treatments. The highest grain (5300) and straw (8700 kg ha’)
yields were recorded in the treatment T, (100% RFD) followed by 75% RFD +
25% organic manure. Among the combined application of chemical fertilizers
and organic manures, 75% RFD + 25% MOC exerted beneficial effects on
yield and yield contributing characteristics of BRRI Dhan 28 compared to
cowdung and poultry manure. A significant increase in the NPK contents as
well as their total uptake due to combined application of fertilizers and
manures were observed. Analyses of post-harvest soil fertility status
revealed that the application of organic manures positively influenced
the organic matter, total N, available P, exchangeable K, available S, and
available Zn contents while all the treatments slightly decreased the soil
pH.
Description
Bangladesh is an agrarian country. Her agriculture is dominated by intensive
rice (Oryza sativa L.) culture, which is the principal carbohydrate supplying
food crop for its increasing population. Here, about 80% of the total
cultivable land is used for this crop. It is grown over about 64.63 lakh
hectares under diverse irrigated and rainfed conditions in the three seasons
(Aus, Aman and Boro) with the total production of 125.55 lakh metric tons
(BBS, 2006). Among the rice growing countries, this republic ranks fourth in
respect of area (10.9 million hectare) and total production (38.5 million tons).
Unfortunately, have its national average yield (3.5 t ha”) is not pleasing one
in compared to other agriculturally advanced countries like Japan, China,
Vietnam and Indonesia, where per hectare yields are 6.50, 6.20, 4.60 and 4.50
t ha’, respectively (FAO, 2006).
Keywords
Available zinc, Available sulphur, Exchangeable potassium, Chemical analyses of plant samples, Preparation of plant samples