The efficacy and loss of fertilizer N in lowland rice

1986 ◽  
pp. 131-147 ◽  
Author(s):  
Paul L G Vlek ◽  
Bernard H Byrnes
Keyword(s):  
Lowland Rice ◽  
Fertilizer N

7. The efficacy and loss of fertilizer N in lowland rice

1986 ◽  
Vol 9 (1-2) ◽  
pp. 131-147 ◽  
Author(s):  
Paul LG Vlek ◽  
Bernard H Byrnes
Keyword(s):  
Lowland Rice ◽  
Fertilizer N

scholarly journals Site-specific Nutrient Management for Lowland Rice in the Northern Savannah Zones of Ghana

2015 ◽  
Vol 3 (2) ◽  
pp. 109-117 ◽  
Author(s):  
W Dogbe ◽  
J. M Sogbedji ◽  
S. S. J Buah
Keyword(s):  
Oryza Sativa L ◽  
Maximum Yield ◽  
Northern Region ◽  
Lowland Rice ◽  
Nutrient Deficiencies ◽  
Fertilizer N ◽  
Site Specific ◽  
Ecological Zones ◽  
West Region ◽  
The Impact

A multi-location study was conducted to assess the nitrogen (N), phosphorous (P) and potassium (K) requirements of lowland rice (Oryza sativa L.) for a local variety Digang cultivated in the northern Savannahs of Ghana and offer site specific nutrient recommendations. Ten on-farm nutrient omission trials involving five rates of N, P and K combinations were conducted during 2010 cropping season in Sudan and Guinea Savannah agro-ecological zones. The treatments (kg/ha as N, P2O5 and K2O) comprised 0-0-0 (control), 0-90-90 (zero N), 90-0-90 (zero P), 90-90-0 (zero K), 90-90-90 (NPK). Grain yields were increased by applying fertilizer N, P and K in sufficient amounts (90 N, 90 P2O5 and 90 K2O kg/ha) to overcome deficiencies and maintain soil fertility. Nitrogen was a major limiting nutrient in the irrigated and rain fed lowlands in the northern Savannahs of Ghana. The N-limited yields varied between 832 and 1875 kg/ha, suggesting variability of N supplying capacity of the experimental plots. The impact of omitting N was different among the locations with the irrigated lowlands ecosystems in the Sudan Savannah that recorded the highest yield loss due to N omission and Guinea Savannah the least. Higher level of fertilizer N (118 kg/ha) was required in the irrigated lowland in the Sudan Savannah to achieve maximum yield compared with 52 to 79 kg N/ha in the rain fed lowlands of Guinea Savannah. Potash fertilizers have little effect on yield, especially in irrigated lowlands in the Sudan Savannah. Grain yield reductions due to nutrient deficiencies were more severe in the Upper West region than in Upper East region and Northern region. Higher levels of N in irrigated lowland ecosystems in the Sudan Savannah and higher P and K may be required in Upper West region in the Guinea Savannah than recommended for achieving higher yields on a sustainable basis.

Evaluation of measures intended to increase the fertilizer-N recovery by lowland rice

1988 ◽  
Vol 106 (1) ◽  
pp. 149-152 ◽  
Author(s):  
R. J. M. P. Schoenmakers ◽  
L. F. Kruyt ◽  
A. van Diest
Keyword(s):  
Lowland Rice ◽  
N Recovery ◽  
Fertilizer N ◽  
Fertilizer N Recovery

Analysis of phosphorus in two humic acid fractions of intensively cropped lowland rice soils by 31P-NMR

2000 ◽  
Vol 51 (3) ◽  
pp. 391-402 ◽  
Author(s):  
N. Mahieu ◽  
D. C. Olk ◽  
E. W. Randall
Keyword(s):  
Humic Acid ◽  
31P Nmr ◽  
Lowland Rice ◽  
Rice Soils

Lowland Rice Yield as Affected by Straw Incorporation and Inorganic Fertilizer Over Cropping Seasons in Fluvisol

2014 ◽  
Vol 3 (1) ◽  
pp. 129-141
Author(s):  
Brahima Koné ◽  
Zadi Florent ◽  
Gala bi Trazié Jeremie ◽  
Akassimadou Edja Fulgence ◽  
Konan Kouamé Firmin ◽  
...  
Keyword(s):  
Grain Yield ◽  
Rice Variety ◽  
Mineral Fertilizer ◽  
Lowland Rice ◽  
Inorganic Fertilizer ◽  
Cropping Season ◽  
Significant Difference ◽  
Straw Incorporation ◽  
Cropping Seasons ◽  
Fertilizer Effect

Grain yield stabilization of lowland rice over cropping seasons was explored using different compositions of inorganic fertilizers (NPK, NPKCa, NPKMg, NPKZn, NPKCaMg, NPKCaZn and NPKCaMgZn) and straw incorporation (3, 6, 9, 12 and 15 tha-1 ). No fertilizer and no straw amended plot was the control in a split-plot design with three replications laid in a Fluvisol of Guinea savanna in Centre Cote d’Ivoire. Three weeks old nursery rice variety NERICA L19 was transplanted. No significant difference of grain yield was observed between the different treatments excluding the highest yields recorded for treatments NPKMg (5.09 tha-1 ), NPKZn (5.15 tha-1 ) and NPKCaéMg (5.31 tha-1 ) compared with 12 (3.95 tha1 ) and 15 tha-1 (4.14 tha-1 ) as straw rates respectively. Grain yield declining trend was more pronounced for mineral fertilizer treatments showing twice greater depressive effect of cropping cycle compared with the straw especially, for treatments characterized by highest grain yield in the first cropping season and similar grain yields were recorded for both sources of nutrient in the third cropping cycle. Of slowness of nutrients releasing by straw, highest grain yield was expected for this soil amender within a longer period of cultivation whereas, unbalance soil micronutrients should be relevant to studious declining yield under inorganic fertilizer effect. Nevertheless, the straw rate of 12 tha-1 supplying 0.58% of NPK as mineral fertilizer equivalent can be recommended for sustaining lowland rice production in the studied agro-ecosystems unless for three cropping seasons.

PENGARUH ZEOLIT DALAM PUPUK TERHADAP PERTUMBUHAN DAN PRODUKSI PADI SAWAH DI KABUPATEN BADUNG PROVINSI BALI

2013 ◽  
Vol 14 (3) ◽  
Author(s):  
Akhmad Jufri ◽  
Mochamad Rosjidi
Keyword(s):  
Field Experiment ◽  
Rainy Season ◽  
Rice Cultivation ◽  
Lowland Rice ◽  
Cultivation Practices

Many efforts are conducted to increase the fertilising efficiency, especially nitrogen in rice cultivation practices. This field experiment was conducted to evaluate the effect of zeolite on growth and production of lowland rice during rainy season in Badung, Bali. The experiment showed that fertilizer mixed with zeolite resulted in the same growth and productivity, although the fertilising doses was reduced. This means that zeolite incread fertilising efficiency in rice cultivation.

Effect of Water Depth on Nitrogen Use Efficiency and Nitrogen‐15 Balance in Lowland Rice 1

1987 ◽  
Vol 79 (2) ◽  
pp. 210-216 ◽  
Author(s):  
S. K. De Datta ◽  
W. N. Obcemea ◽  
R. Y. Chen ◽  
J. C. Calabio ◽  
R. C. Evangelista
Keyword(s):  
Water Depth ◽  
Nitrogen Use Efficiency ◽  
Lowland Rice ◽  
Nitrogen Use ◽  
Effect Of Water ◽  
Use Efficiency
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