Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands

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Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands. / Ghaley, Bhim Bahadur; Jensen, Henning Høgh; Christiansen, Jørgen Lindskrog.

I: Plant and Soil, Bind 332, Nr. 1-2, 2010, s. 233-246.

Publikation: Bidrag til tidsskriftTidsskriftartikelfagfællebedømt

Harvard

Ghaley, BB, Jensen, HH & Christiansen, JL 2010, 'Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands', Plant and Soil, bind 332, nr. 1-2, s. 233-246. https://doi.org/10.1007/s11104-010-0288-3

APA

Ghaley, B. B., Jensen, H. H., & Christiansen, J. L. (2010). Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands. Plant and Soil, 332(1-2), 233-246. https://doi.org/10.1007/s11104-010-0288-3

Vancouver

Ghaley BB, Jensen HH, Christiansen JL. Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands. Plant and Soil. 2010;332(1-2):233-246. https://doi.org/10.1007/s11104-010-0288-3

Author

Ghaley, Bhim Bahadur ; Jensen, Henning Høgh ; Christiansen, Jørgen Lindskrog. / Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands. I: Plant and Soil. 2010 ; Bind 332, Nr. 1-2. s. 233-246.

Bibtex

@article{6cb9a9207d1b11df928f000ea68e967b,
title = "Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands",
abstract = "The recovery of soil derived nitrogen (NDFS) and fertilizer N (NDFF) was investigated in highland rice (Oryza sativa L.) fields in Bhutan, characterized by high inputs of farmyard manure (FYM). The effect of 60 kg N ha-1 (60 N) applied in two splits to a traditional and an improved cultivar, popular among the farmers, was investigated using the 15N isotope dilution technique. No differences were found between cultivars with respect to the uptake of NDFS and NDFF, but the improved cultivar yielded 27% more (P¿=¿0.05) grain compared with the traditional cultivar. This was largely due to its greater harvest index (HI). The mean percentage recovery of fertilizer N (REN) applied at 45 days after transplanting (DAT) was 34% compared to 22% at 7 DAT, resulting in 56% greater uptake of NDFF at 45 DAT. The overall REN for both the improved and the traditional cultivars were 25.7% and 30% respectively, with no difference between cultivars, but REN decreased with increasing FYM inputs. Fertilizer N recommendations that allow for previous FYM inputs combined with applications timed to coincide with maximum crop demand (45 DAT), and the use of improved cultivars, could enhance N fertilizer recoveries (REN) and increase rice yields in the Bhutan Highlands.",
keywords = "BRIC, Added nitrogen interaction, Oryza sativa L., 15N isotope dilution, Farmyard manure, Environmental index, Nitrogen fertilizer",
author = "Ghaley, {Bhim Bahadur} and Jensen, {Henning H{\o}gh} and Christiansen, {J{\o}rgen Lindskrog}",
year = "2010",
doi = "10.1007/s11104-010-0288-3",
language = "English",
volume = "332",
pages = "233--246",
journal = "Plant and Soil",
issn = "0032-079X",
publisher = "Springer",
number = "1-2",

}

RIS

TY - JOUR

T1 - Recovery of nitrogen fertilizer by traditional and improved rice cultivars in the Bhutan Highlands

AU - Ghaley, Bhim Bahadur

AU - Jensen, Henning Høgh

AU - Christiansen, Jørgen Lindskrog

PY - 2010

Y1 - 2010

N2 - The recovery of soil derived nitrogen (NDFS) and fertilizer N (NDFF) was investigated in highland rice (Oryza sativa L.) fields in Bhutan, characterized by high inputs of farmyard manure (FYM). The effect of 60 kg N ha-1 (60 N) applied in two splits to a traditional and an improved cultivar, popular among the farmers, was investigated using the 15N isotope dilution technique. No differences were found between cultivars with respect to the uptake of NDFS and NDFF, but the improved cultivar yielded 27% more (P¿=¿0.05) grain compared with the traditional cultivar. This was largely due to its greater harvest index (HI). The mean percentage recovery of fertilizer N (REN) applied at 45 days after transplanting (DAT) was 34% compared to 22% at 7 DAT, resulting in 56% greater uptake of NDFF at 45 DAT. The overall REN for both the improved and the traditional cultivars were 25.7% and 30% respectively, with no difference between cultivars, but REN decreased with increasing FYM inputs. Fertilizer N recommendations that allow for previous FYM inputs combined with applications timed to coincide with maximum crop demand (45 DAT), and the use of improved cultivars, could enhance N fertilizer recoveries (REN) and increase rice yields in the Bhutan Highlands.

AB - The recovery of soil derived nitrogen (NDFS) and fertilizer N (NDFF) was investigated in highland rice (Oryza sativa L.) fields in Bhutan, characterized by high inputs of farmyard manure (FYM). The effect of 60 kg N ha-1 (60 N) applied in two splits to a traditional and an improved cultivar, popular among the farmers, was investigated using the 15N isotope dilution technique. No differences were found between cultivars with respect to the uptake of NDFS and NDFF, but the improved cultivar yielded 27% more (P¿=¿0.05) grain compared with the traditional cultivar. This was largely due to its greater harvest index (HI). The mean percentage recovery of fertilizer N (REN) applied at 45 days after transplanting (DAT) was 34% compared to 22% at 7 DAT, resulting in 56% greater uptake of NDFF at 45 DAT. The overall REN for both the improved and the traditional cultivars were 25.7% and 30% respectively, with no difference between cultivars, but REN decreased with increasing FYM inputs. Fertilizer N recommendations that allow for previous FYM inputs combined with applications timed to coincide with maximum crop demand (45 DAT), and the use of improved cultivars, could enhance N fertilizer recoveries (REN) and increase rice yields in the Bhutan Highlands.

KW - BRIC

KW - Added nitrogen interaction

KW - Oryza sativa L.

KW - 15N isotope dilution

KW - Farmyard manure

KW - Environmental index

KW - Nitrogen fertilizer

U2 - 10.1007/s11104-010-0288-3

DO - 10.1007/s11104-010-0288-3

M3 - Journal article

VL - 332

SP - 233

EP - 246

JO - Plant and Soil

JF - Plant and Soil

SN - 0032-079X

IS - 1-2

ER -

ID: 20391958