TITLE:
Effect of Missing Nutrient Elements on Grain Yield of Wet Season Rice in Bangladesh
AUTHORS:
Md Mozammel Haque, Abdul Latif Sha, Jatish Chandra Biswas, Md Rafiqul Islam, Aminul Islam, Umme Aminun Naher
KEYWORDS:
Long-Term, Fertilizer, Soil Nutrient Status, Photosynthetic Rate, Variety, Yield Pattern
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.10 No.4,
April
26,
2019
ABSTRACT:
Background
and objective: Long-term
fertility study is one of the important factors to monitor changes in yield because of different nutrient management options and
cropping systems involved in Asian regions. Many short-term and long-term fertilizer
trials were conducted for intensive
irrigated rice cropping patterns mostly to provide fertilizer rate, but did not considered sustainable
soil management for soil health. The objective of the present study was to examine the effect of missing
nutrient elements for a long time on rice yield, photosynthetic rate and residual soil fertility. Materials
and Methods: The experiment was initiated
on a permanent layout at the Bangladesh Rice Research Institute (BRRI) farm,
Gazipur during
2000 to 2008 in wet season. Seven treatments in randomized complete block
design with four replications were imposed. Grain yield was determined at physiological maturity
from three 5 m2 areas within each plot followed by bagging and
threshing. Photosynthetic was measure by Li Cor 6400 (USA) machine during study
period. Soil
sample was analyzed for following standard methods. Results: It was found that grain
yield was in decreasing trends for the missing elements that were similar with
BR 11 and
BRRI dhan 31. On an
average, grain yield reductions were 11.6, 7.0, 10.6, 1.1 and 3.4 percent for -N,
-P, -K, -S and -Zn, than complete fertilizer treatment (NPKSZn) respectively. Under no
fertilization, the ability of soil was to produce 2.9 t·ha-1 of BR11 and 3.1 t·ha-1 of BRRI dhan 31 respectively.
Photosynthetic rate of rice plant was always higher in complete fertilizer
treatment (NPKSZn) than missing of any nutrient element. The decrease in
photosynthetic rate was more pronounced with N missing than others for both the
rice varieties. Conclusion: It is concluded that balance chemical fertilizers (NPKSZn) are to be used for
sustained and/or increased rice production and to maintain soil fertility.