Seaweed extract as organic bio-stimulant improves productivity and quality of rice in eastern Himalayas
Autor: | Ram Swaroop Meena, Arup Ghosh, S. V. Ngachan, Jayanta Layek, S. T. Zodape, Anup Das, Gulab Singh Yadav, Ramkrushna Gandhiji Idapuganti, A. S. Panwar, Dibyendu Sarkar, Rattan Lal |
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Rok vydání: | 2017 |
Předmět: |
0106 biological sciences
Oryza sativa biology Nutrient management food and beverages 04 agricultural and veterinary sciences Plant Science Aquatic Science biology.organism_classification 01 natural sciences Kappaphycus alvarezii Agronomy Seedling Germination Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Dry matter Soil fertility 010606 plant biology & botany |
Zdroj: | Journal of Applied Phycology. 30:547-558 |
ISSN: | 1573-5176 0921-8971 |
Popis: | Enhancing productivity through integrated nutrient management is pertinent to sustainable intensification of agricultural ecosystems. Field experiments were conducted during 2012 and 2013 in Eastern Himalayas with extracts from Kappaphycus alvarezii (K sap) and Gracilaria edulis (G sap) to assess growth, productivity and quality enhancement of rice (Oryza sativa). A Petri dish experiment was also conducted to assess the efficacy of saps in improving germination percentage and seedling vigour of rice seedlings. Field experiment included foliar spray of K and G saps (2.5, 5, 10 and 15% concentrations) with 100% recommended dose of fertilizers (RDF) along with water spray + 100% RDF (control). The rice seeds soaked with lower concentrations (2.5 and 5%) of K and G saps recorded higher germination percentage, root and shoot length and seedling vigour index as compared to water soaking. Whilst soaking in higher concentrations (7.5% and above) reduced the germination percentage and seedling vigour index. Foliar spray of K or G sap at 5% and above concentrations + 100% RDF significantly increased plant height, dry matter accumulation, chlorophyll index, crop growth rate, yield attributes and yield of rice (5.4 to 18.4% higher) as compared to control. Application of K or G sap at 10% concentrations + 100% RDF also increased micro-nutrient (Fe, Cu, Zn and Mn) and protein concentration in rice grains. Thus, foliar application of 10% K or G sap along with 100% RDF is a recommendable option for improving yield and quality of rice and sustaining soil fertility in eastern Himalayas and similar agroecosystems elsewhere. |
Databáze: | OpenAIRE |
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