TITLE:
Combined Effect of Organic Manures and Inorganic Fertilizers on the Growth and Yield of Hybrid Rice (Palethwe-1)
AUTHORS:
Kyi Moe, Kumudra Win Mg, Kyaw Kyaw Win, Takeo Yamakawa
KEYWORDS:
Growth Parameter, Inorganic Fertilizers, Organic Manures, Rice, Yield
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.5,
April
21,
2017
ABSTRACT: We investigated the effect
of combining organic and inorganic fertilizers on the growth and yield of
hybrid rice (Palethwe-1) in the dry and wet seasons of 2015. Four quantities of
inorganic fertilizer were used in the main plot [0%, 50%, 75%, and 100%
nitrogen, phosphorus, and potassium (NPK)] based on the recommended amounts of
150 kg N ha-1, 70 kg P2O5 ha-1, and 120 kg K2O ha-1, while different organic manures were applied to
subplots [no organic manure (O0), cow manure (Oc),
poultry manure (Op), and vermicompost (Ov); all at 5 t·ha-1] as part of a split-plot experimental design with
three replicates. In both seasons, significant differences in growth parameters
including number of tillers hill-1, soil-plant analysis development (SPAD) values,
total dry matter, yield, and yield components were observed in plants supplied
with different inorganic fertilizers. The 100% NPK (I100) fertilizer
produced the maximum yield but similar yields were achieved in plots supplied
with 50% NPK (I50) and 75% NPK (I75). Significant
differences in growth and yield parameters were also found in crops supplied
with organic manures. Although identical quantities were supplied, Op produced the best growth parameters in both seasons including total dry matter,
yield, and yield components. Oc also performed well. Combining
inorganic and organic fertilizers demonstrated that I50 together
with Op (5 t·ha-1) provided similar growth, total dry matter, and
yield parameters to I100 in both seasons. Oc (5 t·ha-1) plus I75 also achieved similar yields
to I100. This study demonstrates that the combined application of inorganic
fertilizers and organic manures has the potential to reduce chemical fertilizer
usage without decreasing the yield of hybrid rice, and can enhance the growth,
yield, and yield components of Palethwe-1.