RICE YIELD AS AFFECTED BY SEEDLING VIGOUR THROUGH NUTRIENT MANAGEMENT TECHNIQUES IN NURSERY
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Date
2012
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ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
Abstract
A field experiment entitled “Rice yield as affected by seedling vigour
through nutrient management techniques in nursery” was conducted at
Agricultural College Farm, Bapatla on clay loam soil during kharif season of
2011. The experiment consisted of twelve treatments viz., 100 kg N ha-1 (T1), 150
kg N ha-1 (T2), 200 kg N ha-1 (T3), T1 + 10 t FYM ha-1 (T4), T2 + 10 t FYM ha-1
(T5), T3 + 10 t FYM ha-1 (T6), T1 + soil application of 50 kg ZnSO4 ha-1 (T7),
T2 + soil application of 50 kg ZnSO4 ha-1 (T8), T3+ soil application of 50 kg
ZnSO4 ha-1 (T9), T1+ FYM enriched with phosphorus @ 50 kg ha-1 (T10), T2+
FYM enriched with phosphorus @ 50 kg ha-1 (T11), T3+ FYM enriched with
phosphorus @ 50 kg ha-1 (T12). The experiment in nursery as well as in main
field was laid out in simple Randomized Block Design with three replications.
The treatments were imposed in the nursery only. The seedlings raised from
nursery with different treatments were transplanted in the main field as per the
nursery treatments only. The test variety used was BPT-5204(Samba mashuri).
The findings of the experiment revealed that seedling characteristics,
growth parameters and yield attributes were significantly affected by different
nursery treatments. Increasing the fertility levels in rice nursery significantly
increased the yield.
Among different treatments, nursery fertilized with 200 kg N ha-1 + FYM
enriched with phosphorus @ 50 kg ha-1 (T12) treatment resulted the best seedling
characteristics with shoot length of 9.1 and 27.7 cm, shoot drymatter production
of 120 and 527 mg 10 seedlings-1 and with a seedling vigour index of 12.1 and
46.9per cent at 10 and 20 DAS respectively, which was comparable with150 kg
N ha-1 + FYM enriched with phosphorus @ 50 kg ha-1 (T11) and T6 but exhibited
superiority over 100 kg N ha-1 alone (T1).
There was a significant increase in all the growth parameters viz., plant
height, number of tillers m-2 and dry matter production in the main field where
the nursery received 200 kg N ha-1 + FYM enriched with phosphorus @ 50 kg
ha-1 (T12) treatment, which was statistically on a par with that of with 150 kg N
ha-1 + FYM enriched with phosphorus @ 50 kg ha-1 (T11) but superior to 100 kg
N ha-1 alone (T1).
The maximum productive tillers m-2 (416), the highest number of
total (202) and filled grains panicle-1 (106) were observed with the treatment
which received 200 kg N ha-1 + FYM enriched with phosphorus @ 50 kg ha-1
(T12) in the nursery, which was comparable with 150 kg N ha-1 + FYM enriched
with phosphorus @ 50 kg ha-1 (T11) but exhibited superiority over 100 kg N ha-1
only. Test weight was not significantly influenced by any of the treatments.
A significant increase in grain and straw yield (5228 and 5928 kg ha-1
respectively) were recorded by the nursery fertilization of 200 kg N ha-1 + FYM
enriched with phosphorus @ 50 kg ha-1 (T12) treatment which was on a par with
150 kg N ha-1 + FYM enriched with phosphorus @ 50 kg ha-1 (T11) treatment.
However, the harvest index (%) was not influenced by any of the treatments.
The maximum nutrient concentration (N, P and K) at the time of
transplanting was obtained with 200 kg N ha-1 + FYM enriched with phosphorus
@ 50 kg ha-1 (T12) in the seedlings over and above the 100 kg N ha-1 alone (T1).
Nitrogen uptake at maturity also followed similar trend as that of nutrient
concentration at the time of transplanting. Phosphorus and potassium uptake at
maturity were not influenced by nutrient management techniques in nursery.
The highest gross returns (Rs. 57,868/-) and net returns (Rs. 41,354/-)
were registered with 200 kg N ha-1 + FYM enriched with phosphorus @
50 kg ha-1 (T12) which was on a par with that of 150 kg N ha-1 + FYM enriched
with phosphorus @ 50 kg ha-1 (T11).
From the present investigation, it can be concluded that nursery fertilized
with 150 kg N ha-1 + FYM enriched with phosphorus @ 50 kg ha-1 (T11) which
showed similar response as that of 200 kg N ha-1 + FYM enriched with
phosphorus @ 50 kg ha-1 (T12) treatment found to be better, which resulted in
higher productivity, better economic returns and improved the vigour of
seedlings and resulted in better establishment in main field which implies that
there is a possibility of saving of 50 kg N ha-1 with T11 treatment . A few or more
years of continuation of this study would probably be needed for more
consistency before making it as a general recommendation to the farmer’s of this
region.
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Keywords
rice, farmyard manure, yields, developmental stages, grain, nutrients, planting, land resources, biological development, fertilizers