INFLUENCE OF ORGANIC FARMING ON RICE YIELD AND QULITY
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Date
2003
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ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD
Abstract
A field experiment was conducted during kharif 2002 at Rice
Section, Agricultural Research Institute, Rajendranagar, Hyderabad on
clay loam soil of medium in available N, high in available P and K to
find out the influence of organic farming on rice yield and quality. The
treatments consisted of two farming practices (organic and inorganic)
and six rice varieties of different duration (Swarna, Samba Mahsuri,
Early Samba, Kavya, Erramallelu and Tellahamsa). In all, there were 12
treatmental combinations replicated thrice and laid out in randomized
block design with factorial concept.
Statistical analysis of the data revealed that plant height, LAI,
total tillers/m2 and effective tillers/m2 were significantly high in
inorganic farming practices compared to organic farming practices.
However, the grain yield was significantly high in organic farming
treatments than inorganic farming treatments because of more number of
total and filled grains/panicle, more panicle length, panicle weight and
1000 grain weight.
Uptake of nitrogen was significantly higher with inorganic
farming while the uptake of potasssium was significantly more with
organic farming at all growth stages. But phosphorus uptake was not
significantly influenced due to farming practices except at 90 DAT
where organic farming resulted significantly more phosphorus uptake.
The post harvest soil N and K2O status were significantly high with
organic farming treatments, whereas P2O5 status was more with
inorganic farming treatments.
Regarding quality of rice grain, significantly more amylose
content, less broken rice % and more grain hardness were observed with
organic farming. The length to breadth ratio, volume expansion ratio,
hulling percent, protein content were not influenced by farming
practices.
As regards to varietal performance, Kavya recorded significantly
higher grain yield (5.06 t/ha) due to more panicle length, higher number
of grains and filled grains / panicle and followed by Erramallelu (4.65
t/ha) which remained on par with Kavya in terms of grain yield.
Regarding N, P and K uptake by crop at different growth stages,
post harvest nutrient status of soil and quality characters of grain as
influenced by farming practices and rice varieties were evaluated.
Quality of rice grain was improved due to organic farming practices as
compared to inorganic farming practices.
The results suggest for adoption of organic farming in rice to
increase productivity and also to maintain soil fertility.
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Keywords
INFLUENCE, ORGANIC, FARMING, RICE, YIELD, QULITY