Effect of split application of nitrogenand plant spacing on lowland bunded rice ( o r - sntiva)
DOI:
https://doi.org/10.59797/ija.v41i3.3694Keywords:
Abstract
Application of nitrogen in split doses 15 cm x 20 cm) and 5 splits of I00 kg Nlha according to the growth stage and plant in different doses at various crop growth spacing of wetland bunded rice (Oryza stages (Table 1). The experinlent was laid saliva L.) crop are important factors to out in split-plot design with 3 replications exploit the potential of the high-yielding, by keeping levels of spacing in main plot improved variety by reducing the leaching and split doses of N in subplol. A basal dose of N with increasing N-use efficiency. of 50 kg P,O,/ha and 30 kg I<,O/lia were Therefore, an experiment was conducted to applied at the time of puddling Tn tlie field. find out optimum plant population and N 100 kglha was applied as pcr tlie split lev- appropriate quantity of split N at different els in the treatments through urea. R 269 growth stages to harvest potential yield of rice was tranplanted 3 scedlingslliill with 30 rice. - and 25-day-old seedling on 6 August 1989 A field experiment was conducted at and 8 July 1990 respectively. Waraseoni during the rainy season (kharzj) The crop transplanted at closer spacings of 1989 and 1990. The soil (0-1 5 cm) of the S, ( 15 qmx 10 c1n)alld S, (I5 cm x 15 cm) field had pH 7.2 and available N, P,O, and recorded, significa~itly higlicl. grain yield K,O 3 15.0, 9.0 and 408.5 kglha respective- and effective tillers/ri12 than wider spacings I< The treatment consisted of 3 levels of S, (15 cm x 20 cm) in pooled analysis spacing (I5 cm x 10 cm, 15 cm x 20 cm and (Table 1). The significant increase in S, andReferences
variety 'Andrew Sali'performed considera- up to 5 August with an average yield of 53 bly well under this condition. qlha. ''ET 725 1' may be used for only Ac-Thus 'IET 9188' could be suitably trans- gust planting with an average yield of 42 ql planted both under normal (average yield 52 .t a. In addition to 'IET 9 188'. 'I ET 8002'
q/ha) and late planting up to 5 September and 'Andrew Sali' could also bc grown suit- (average yield, 34 qlha). 'IET 6666' could ably under late plantings up lo 5 September be transplanted only under normal planting with an average yield of 3-8 qlha.
Indian J. Agron. 41 (3) : 490-492 (September 1996)
Effect of split application of nitrogen'and plant spacing on lowland bunded rice (or-sntiva)
Regional Agricultural Research Station, lndira Gandhi Krishi Vishnltr Vi~(~rrl~!l~rr
(Raipur), Waraseoni, Madhya Pradesh 481 331
Received: March I993
Application of nitrogen in split doses according to the growth stage and plant spacing of wetland bunded rice (Oryza saliva L.) crop are important factors to exploit the potential of the high-yielding, improved variety by reducing the leaching of N with increasing N-use efficiency. Therefore, an experiment was conducted to find out optimum plant population and appropriate quantity of split N at different growth stages to harvest potential yield of rice.
A field experiment was conducted at Waraseoni during the rainy season (kharzj) of 1989 and 1990. The soil (0-1 5 cm) of the field had pH 7.2 and available N, P,O, and K,O 3 15.0, 9.0 and 408.5 kglha respective- I< The treatment consisted of 3 levels of spacing (I5 cm x 10 cm, 15 cm x 20 cm and 15 cm x 20 cm) and 5 splits of I00 kg Nlha in different doses at various crop growth stages (Table 1). The experinlent was laid out in split-plot design with 3 replications by keeping levels of spacing in main plot and split doses of N in subplol. A basal dose of 50 kg P,O,/ha and 30 kg I<,O/lia were applied at the time of puddling Tn tlie field. N 100 kglha was applied as pcr tlie split lev- els in the treatments through urea. 'R 269' rice was tranplanted 3 scedlingslliill with 30
-and 25-day-old seedling on 6August 1989 and 8 July 1990 respectively.
The crop transplanted at closer spacings S, ( 15 qmx 10 c1n)alld S, (I5 cm x 15 cm) recorded, significa~itly higlicl. grain yield and effective tillers/ri12 than wider spacings S, (15 cm x 20 cm) in pooled analysis (Table 1). The significant increase in S, and
Table 1. Effect of spacing and split application of nitrogen on growth character and yield of rice (pooled data of 2 years)
Treatment Plant height Tillers/m2 Effective Panicle length Panicle Test Grains/ Grain Grain $
(an) tillers/ (an) weight weight panicle yield1 yield 8 m2 (g) (9) panicle (g) (qka) 5
Spacing (crn x cm) S,, 15 x 10
S,, 15 x 15 102.55 349.60 257.95 22.95 3.50 28.55 104.0 3.6 40.80
S,, 15x20 101.75 307.15 238.00 22.45 3.40 27.70 102.3 3.2 34.90
CD (P = 0.05) NS 40.61 17.04 NS NS NS NS' 0.2 2.13 z
Split Ndose (1 00 kg/ha)
Bosal 8DAT Tillering Panicle M initiation '
T,, 30% 40% 30% 103.05 345.00 251.30 23.25 3.85 30.75 113.6 3.8 , . 44.m .. , $
T,,50% 25% 25O/b 104.20 366.00 257.70 22.95 3.55 29.50 104.4 3.6 39.40
uT,, 25% 50% 25% 101.50 314.55 261.75 22.65 3.35 27.75 103.4 3.5 38.80
DAT, Days after transplanting
* Recommended split application of nitrogen
PARAYA ETAL. IVol. 41. No. 3
S, treatments can be attributed to appropriate plant density in S, and square planting pattern in S, which might have utilized all available sources for better effective tillers/m2 and grain yield. The present findings are in agreement with those of Rathi et al. (1983), Wagh and Thorat (1987) and Gupta and Sharma (1991).
Split application of 100 kg N/ha significantly influenced all the yield attributes along with grain yield except effective tillers/m2 in pooled analysis. Split application of nitrogen as 30% basal + 40% at tillering and 30% at panicle initiation (TI) gave significantly higher grain yield than the other treatments by 13.45 and
3 1% than T, (recommended split dose of N) and T, respectively. The recommended split of nitrogen dose (T,) also gave significantly higher grain yield than T, treatment. TI and T, recorded significantly higher plant height, tillers/m2, panicle length and weight, test weight, grains/ panicle and grain yieldlpanicle than T,. The highest grain yield in TI may be attributed to significantly increased panicle weight in T, compared with T, because of efficient spliting of nitrogen by increasing 1 5% and 5% dose at tillering and panicle-initation over the recommanded split dose at tillering and panicle initiation stage (T,) respectively. Wagh and Thorat (1987) and Mohapatra (1992), also reported response to split applicatian of nitrogen.
Gupta, A. K. and Sharma, I<. S. 1001. Illl'ect of plant spacing and fertility lcvcl 011 grain yield ofearly medium indica ricc (01:l~ztt scttiva). Indian
.-Jouranl of Agronot~i)~ 22536 :223
Mohapaba and Ashok Kunlar. 1002. Ilcspol~se of rainfed lowland rice (OIJJZUstt/il~tt) lo timing of beushaning and nitrogcl~ Illilllilpctliellt. Indian Journal of Agrono~~~y
( I) : 1.50-1 60. Rathi, C. S., Patel, J. P. and Slii~niii~,
I<.S.1983. Relative performance of solac dwarl'varicties of rice and their response of spacing i111d plilnling patteni. In- dian Journal of Agrotio111)~ 29 (2) :2 18-22 I.
Wagh, R. G.'andThorat, S. T. 1987. Ellcct ofsplit appli- cation of nibogen and pli1111 dcnsilies on yield and yield attributes of ricc. Orjro 21(2) : 169-1 71 .
Indian J. Agron. 41 (3) :492-494 (September 1996)
Efficiency of triacontanol granules on transplanted kltnrif 'IR SO' rice (Oryza sativa)
Palli Siksha Bhavana (Institute of Agriculture), Visva-Bharuli, Sri~iikclun,
West Bengal731236 A field experiment was conducted during at Sriniketan located under the lateritic tracr warm-wet (kharifl season of 1991 with of West Bengal. The experiment consisting transplanted 'IR 50' rice (Oryza sativa L.) of 3 replications of 15 trcatments was laid
