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EFFECT OF SPLIT APPLICATION OF NITROGEN FERTILIZER ON MORPHO-PHYSIOLOGICAL ATTRIBUTES AND GRAIN YIELD OF BROADCAST SEEDED EGYPTIAN HYBRID RICE (Ι)

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Last updated: 04 Jan 2025

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Abstract

An experiment was carried out at the Experimental Farm of Rice Research and Training Center (RRTC), Sakha, Kafr El-Sheikh, Egypt, during 2011 and 2012 seasons. The experiment was laid out in a split plot design with four replications. The main plots were devoted to the nitrogen level 220kg N/ha in form of urea (46.5% N). The sub-plots were allocated to the six times of nitrogen application to assess the effect of six nitrogen application treatments, viz., T_1: (2⁄(3 )  as B ( basal ) + 1⁄3 at PI ( panicle initiation)), T_2: (1⁄3 as B +  1⁄3 at MT (mid-tillering) + 1⁄3 at PI.)), T_3:(1⁄2 as B + 1⁄4 at MT + 1⁄4 at PI.)), T_4:(1⁄4 as B + 1⁄4 at MT + 1⁄4 at PI + 1⁄4 at BT (booting)), T_5:(1⁄4 as B + 1⁄4  at MT + 1⁄4 at BT + 1⁄4 at CH (complete heading)), and T_6:(1⁄4 as B + 1⁄4 at  MT + 1⁄4 at  PI  + 1⁄4 at F ( flowering)) on morpho-physiological attributes and grain yield of Egyptian hybrid rice (1) under broadcast seeded-rice. The results revealed that nitrogen levels caused significant increases in all morpho-physiological attributes and grain yield of Egyptian hybrid rice (1), except for number of primary branches/panicle, number of panicle/m², panicle weight and 1000-grain weight in both seasons. Leaf area index and dry matter production at flowering were significantly increased in first and second seasons, respectively, Increasing N-level up to 220kg N/ha significantly increased number of unfilled grains/panicle and straw yield t/ha. In addition, application of 165kg N/ha produced the highest values of number of filled grains/panicle, grain yield t/ha and harvest index in both seasons. Moreover, It was observed that the highest estimated values of dry matter production at panicle initiation and straw yield; and the  lowest number of panicles/m² were recorded in the first treatment (T_1), without significant differences with the 〖(T〗_(3  )) and 〖(T〗_(5 )) treatments in both seasons. The highest dry matter production at flowering, LAI at flowering, chlorophyll content in flag leaf, days to 50% heading, plant height at harvest, number of primary branches/panicle, panicle weight, heaviest 1000-grain weight, harvest index and  grain yield were exhibited in 〖(T〗_(6  )) in both seasons, The interaction between nitrogen levels and time of nitrogen application had significant effect on dry matter production ( g/m²) at panicle initiation, leaf area index at both panicle initiation and at flowering, chlorophyll content in flag leaf and number of tillers/m², number of filled grains/panicle in both seasons and number of unfilled grains/panicle in the second season. From the obtained results, it could be recommended that splitting of N-fertilizer application with the rate of 165 kg/ha in four equal doses i.e. as basal application, mid-tillering, panicle initiation and at the flowering stages were played a remarkable role for achievement of high yield production from Egyptian hybrid (1) rice genotype, when it grown under broadcast seeded rice under normal soil in Egypt.

DOI

10.21608/jpp.2013.74091

Keywords

rice, nitrogen, split application, morpho-physiological, chlorophyll and grain yield

Authors

First Name

W.

Last Name

Elkhoby

MiddleName

M.

Affiliation

Rice Research and Training Center, Filed Crops Research Institute, ARC, Giza, Egypt.

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First Name

A.

Last Name

El-Khtyar

MiddleName

M.

Affiliation

Rice Research and Training Center, Filed Crops Research Institute, ARC, Giza, Egypt.

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City

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Orcid

-

First Name

H.

Last Name

Hassan

MiddleName

M.

Affiliation

Rice Research and Training Center, Filed Crops Research Institute, ARC, Giza, Egypt.

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City

-

Orcid

-

First Name

B.

Last Name

Mikhael

MiddleName

B.

Affiliation

Rice Research and Training Center, Filed Crops Research Institute, ARC, Giza, Egypt.

Email

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City

-

Orcid

-

First Name

Kh.

Last Name

Abdelaal

MiddleName

A.

Affiliation

Botany Department, Faculty of Agriculture, Kafr Elsheikh University, Egypt.

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Volume

4

Article Issue

8

Related Issue

11167

Issue Date

2013-08-01

Receive Date

2020-02-27

Publish Date

2013-08-01

Page Start

1,259

Page End

1,280

Print ISSN

2090-3669

Online ISSN

2090-374X

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https://jpp.journals.ekb.eg/article_74091.html

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https://jpp.journals.ekb.eg/service?article_code=74091

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9

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Original Article

Type Code

887

Publication Type

Journal

Publication Title

Journal of Plant Production

Publication Link

https://jpp.journals.ekb.eg/

MainTitle

EFFECT OF SPLIT APPLICATION OF NITROGEN FERTILIZER ON MORPHO-PHYSIOLOGICAL ATTRIBUTES AND GRAIN YIELD OF BROADCAST SEEDED EGYPTIAN HYBRID RICE (Ι)

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Article

Created At

22 Jan 2023