Growth and Yield Performance of Inbred and Hybrid Rice Varieties as Influenced by Combined Application of Organic and Inorganic Fertilizers
Raynilda R. Baoy | Dionesio M Banoc
Abstract:
The study evaluated the effects of organic and inorganic fertilizers on
the growth and yield of two lowland rice varieties; determined the proper
fertilizer combination; and evaluated the profitability of rice production as
influenced by the combined application of organic and inorganic
fertilizers. This was laid out in split plot arranged in a RCBD design with
variety and fertilizer treatments as the main plot and subplot, respectively.
Results revealed that the period from sowing to heading, shoot dry
weight, number of filled grains per panicle and weight of 1,000 grains were
significantly influenced by the variety. The yield, yield components and
harvest index (HI) were significantly influenced by fertilizer application. A
significant interaction effect was noted on the period from sowing to
heading as observed that inbred rice (NSIC Rc212) headed late than hybrid
(TH82). Plants applied with 120-60-60 kg ha N, P O and K O produced -1
2 5 2
taller height, larger LAI, longer panicles, more productive tillers and filled
grains, and consequently highest grain yield and HI. These plants also
produced the heaviest root and shoot dry weights resulting to higher root
shoot ratio compared to unfertilized plants. Highest net income was
obtained in plants applied with inorganic fertilizer at the rate of 120-60-60
kg ha N, P O K O due to high grain yield. Irrespective of fertilizer -1
2 5, 2
treatments, inbred rice was more profitable than hybrid. Highest
production cost was incurred in plants applied with pure organic fertilizer
due to the high cost of the material.
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