Effects of need-based nitrogen management and varieties on growth and yield of dry direct seeded rice

Sah Shrawan Kumar, . and Subedi Purushottam, . and Marahattha Santosh, . and Yadav Dil Raj, . Effects of need-based nitrogen management and varieties on growth and yield of dry direct seeded rice. pp. 453-466. ISSN 1511-3701

Proper application of nitrogen fertilizer is vital to improve crop growth and development. A field experiment was conducted to evaluate the need based nitrogen management using leaf color chart (LCC) on crop growth and yield of dry direct seeded rice (DDSR) with five nitrogen management practices 0 kg N ha- 120 kg N ha- in three equal split applications 30 kg N ha- as basal 30 kg N ha- top dressing based on LCC critical value four 30 kg N ha- top dressing (without basal N dose) at 15 days after sowing (DAS) LCC based N application and pure LCC (without basal N dose) based N application tested on three rice varieties (Radha-4 US-312 and Sukhkhadhan-5) in split plot design. The results revealed that the highest grain yield was observed in hybrid US-312 (4 695 kg ha-) with higher plant height leaf area index (LAI) and dry matter production than the inbred varieties i.e. Radha-4 and Sukhkhadhan-5. All the nitrogen management treatments including LCC were similar to each other in respect of grain yield formation (4 695-4 891 kg ha-) but remained significantly superior over three split applications (4 408 kg ha-). Likewise values of growth parameters were higher in LCC based treatments than the recommended practice and grain yield being the highest in pure LCC (4 891 kg ha-). Thus pure LCC based nitrogen management found to be the best practice for both inbred and hybrid rice varieties.

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Abstract

Proper application of nitrogen fertilizer is vital to improve crop growth and development. A field experiment was conducted to evaluate the need based nitrogen management using leaf color chart (LCC) on crop growth and yield of dry direct seeded rice (DDSR) with five nitrogen management practices 0 kg N ha- 120 kg N ha- in three equal split applications 30 kg N ha- as basal 30 kg N ha- top dressing based on LCC critical value four 30 kg N ha- top dressing (without basal N dose) at 15 days after sowing (DAS) LCC based N application and pure LCC (without basal N dose) based N application tested on three rice varieties (Radha-4 US-312 and Sukhkhadhan-5) in split plot design. The results revealed that the highest grain yield was observed in hybrid US-312 (4 695 kg ha-) with higher plant height leaf area index (LAI) and dry matter production than the inbred varieties i.e. Radha-4 and Sukhkhadhan-5. All the nitrogen management treatments including LCC were similar to each other in respect of grain yield formation (4 695-4 891 kg ha-) but remained significantly superior over three split applications (4 408 kg ha-). Likewise values of growth parameters were higher in LCC based treatments than the recommended practice and grain yield being the highest in pure LCC (4 891 kg ha-). Thus pure LCC based nitrogen management found to be the best practice for both inbred and hybrid rice varieties.

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Item Type:	Article
AGROVOC Term:	Rice
AGROVOC Term:	Oryza sativa
AGROVOC Term:	Fertilizer application
AGROVOC Term:	Nitrogen fertilizers
AGROVOC Term:	Hybrid varieties
AGROVOC Term:	Growth
AGROVOC Term:	Height
AGROVOC Term:	Leaf area index
AGROVOC Term:	Dry matter content
AGROVOC Term:	Crop yield
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8144

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