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Determining nitrogen status and quantifying nitrogen fertilizer requirement using a critical nitrogen dilution curve for hybrid indica rice under mechanical pot-seedling transplanting pattern
- Source :
- Journal of Integrative Agriculture, Vol 20, Iss 6, Pp 1474-1486 (2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- Field experiments of nitrogen (N) treatment at five different application rates (0, 75, 150, 225, and 300 kg ha−1) were conducted under pot-seedling mechanical transplanting (PMT) in 2018 and 2019. Two high-quality and high-yielding hybrids of indica rice, Huiliangyou 898 and Y Liangyou 900, were used in this study. The N nutrition index (NNI) and accumulated N deficit (Nand), used to assess the N nutrition status in real-time, were calculated for the indica cultivars under PMT with a critical nitrogen concentration (Nc) dilution model based on shoot dry matter (DM) during the whole rice growth stage. The relationships between NNI and Nand with relative yield (RY) were determined, and accurate N application schemes were developed for hybrids indica rice under PMT. The results indicated that high application rate of N-fertilizer significantly increased the concentrations of shoot DM and N in aboveground organs during the observed stages in the two cultivars for two years (P
- Subjects :
- 0106 biological sciences
Agriculture (General)
chemistry.chemical_element
Plant Science
01 natural sciences
Biochemistry
S1-972
Food Animals
Transplanting
Dry matter
Cultivar
Hybrid
critical nitrogen concentration
Ecology
biology
rice
food and beverages
04 agricultural and veterinary sciences
biology.organism_classification
yield
Nitrogen
Dilution
Horticulture
chemistry
Seedling
Shoot
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Animal Science and Zoology
nitrogen nutrient index
Agronomy and Crop Science
010606 plant biology & botany
Food Science
Subjects
Details
- Language :
- English
- ISSN :
- 20953119
- Volume :
- 20
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Journal of Integrative Agriculture
- Accession number :
- edsair.doi.dedup.....41dcf841f7d389486b455302c974e703