EVALUATION OF EFFECTS OF NITROGEN AND MAGNESIUM FERTILIZATION ON RICE YIELD AND FERTILIZER NITROGEN EFFICIENCY USING15N TRACER TECHNIQUE

2001 ◽  
Vol 24 (6) ◽  
pp. 855-871 ◽  
Author(s):  
T. M. A. Choudhury ◽  
Y. M. Khanif
Keyword(s):  
Rice Yield ◽  
Nitrogen Efficiency ◽  
Tracer Technique ◽  
Fertilizer Nitrogen

Nitrogen nutrient index and leaf function affect rice yield and nitrogen efficiency

2019 ◽  
Vol 445 (1-2) ◽  
pp. 7-21 ◽  
Author(s):  
Jiuxin Guo ◽  
Songnan Yang ◽  
Limin Gao ◽  
Zhifeng Lu ◽  
Junjie Guo ◽  
...  
Keyword(s):  
Rice Yield ◽  
Nitrogen Efficiency ◽  
Nutrient Index

scholarly journals Effects of NP-SR Fertilizer Composition and Water Logging on Soil Chemical Properties and N Fertilizer Efficiency in Paddy Field

2021 ◽  
Vol 9 (1) ◽  
pp. 10-19
Author(s):  
Tiara Kartika Sari ◽  
Muhammad Rif’an ◽  
Sakhidin Sakhidin
Keyword(s):  
Rice Yield ◽  
Block Design ◽  
Chemical Properties ◽  
N Fertilizer ◽  
Soil Chemical Properties ◽  
Nitrogen Efficiency ◽  
Fertilizer Efficiency ◽  
Randomized Complete Block Design ◽  
Two Factors ◽  
Food Commodity

Rice is the primary food commodity in Indonesia. To increase the rice production, urea fertilizer has been excessively used, specifically on marginal land. However, it has no desired effect on the plant’s Nitrogen uptake due to volatilization. Previous studies suggest the use of zeolite to be mixed with urea to reduce the volatilization rate. This study aimed to determine the effect of six NP-SR (Nitrogen Phosphorus Slow Release) fertilizer compositions (without NP-SR; 20.69-0; 19.7-5; 17.27-10; 15.9-15; and 18.94-20) on soil chemical properties, nitrogen efficiency, and paddy rice yield on Ultisols at three waterlogging levels (0.5 cm, 3 cm, and 5 cm). The study was an experiment arranged in a Randomized Complete Block Design (RCBD) consisting of two factors, which were waterlogging levels and NP-SR fertilizer compositions. The results showed that waterlogging treatments significantly affected soil chemical properties in the initial vegetative and harvest phases. It can be concluded that the treatment of flooding (up to 3 cm) and fertilizer (NP-SR of 15.90-15) application could significantly reduce the volatilization rate, increase the efficiency of N fertilizer, and increase rice yield.

scholarly journals Rice Yield and the Fate of Fertilizer Nitrogen as Affected by Addition of Earthworm Casts Collected from Oilseed Rape Fields: A Pot Experiment

PLoS ONE ◽  
2016 ◽  
Vol 11 (11) ◽  
pp. e0167152 ◽  
Author(s):  
Min Huang ◽  
Xuefeng Zhou ◽  
Xiaobing Xie ◽  
Chunrong Zhao ◽  
Jiana Chen ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
Rice Yield ◽  
Pot Experiment ◽  
Earthworm Casts ◽  
Fertilizer Nitrogen

The relationship of soil mineral NO3-N with stem NO3-N concentration, and of fertilizer-N with the amount of nitrogen taken up by winter wheat, in experiments testing nitrogen fertilizer in combination with aphicide and fungicides, from 1980 to 1982

1986 ◽  
Vol 106 (3) ◽  
pp. 497-507 ◽  
Author(s):  
R. J. Darby ◽  
F. V. Widdowson ◽  
E. Bird ◽  
M. V. Hewitt
Keyword(s):  
Winter Wheat ◽  
Nitrogen Fertilizer ◽  
Seedling Emergence ◽  
Nitrogen Efficiency ◽  
Fertilizer N ◽  
Soil Mineral ◽  
Mineral N ◽  
Fertilizer Nitrogen ◽  
N Concentration ◽  
Relationship Of

SummaryExperiments on winter wheat were made from 1980 to 1982 to test fungicide and aphicide sprays in factorial combination with four amounts of nitrogen fertilizer, applied in either one or two dressings in spring. The wheat was grown on three farms with contrasting calcareous clay soils from three soil series; each year it followed a 2-year break on one farm, a cereal rotation on the second and continuous wheat on the third. Soils were sampled to a depth of 0·9 m at seedling emergence in autumn, and again in February and April, to determine the NO3-N and NH4-N in each 0·3 m horizon. Crops were sampled for growth analysis at monthly intervals from March onwards and analysed for nitrogen content. Measurements of stem sap NO3-N concentration were also made at 2-weekly intervals from February or March to late June.Measurements of soil mineral N were used to calculate the fertilizer nitrogen dressings used in the experiments. The concentration of NO3-N in the stem sap was related to NO3-N in soil; concentiations remained high until most of the soil NO3-N had been removed by the crop. The time at which stem sap NO3-N concentration declined therefore acted as an index of soil N supply, and the data showed that fertilizer-N was needed when the NO3-N concentration fell below a 200 μg/ml threshold. Yields benefited from N applied in February or March only when stem sap NO3-N concentration fell below the threshold at this time.Apparent fertilizer nitrogen efficiency exceeded 70 % where yields were very large, but ranged between 53 and 64% where yields were smaller because either soil physical problems or disease restraints were present.A severe attack by take-all (Gaeumannomyces cerealis) caused premature senescence at one centre in 1980; this apparently prevented previously assimilated nitrogen from moving into the grain.

scholarly journals Responses of rice yield and the fate of fertilizer nitrogen to soil organic carbon

2017 ◽  
Vol 63 (No. 9) ◽  
pp. 416-421 ◽  
Author(s):  
Peng Weifu ◽  
Zeng Yongjun ◽  
Shi Qinghua ◽  
Huang Shan
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Rice Yield ◽  
N Uptake ◽  
Critical Role ◽  
N Recovery ◽  
Fertilizer N ◽  
Total N ◽  
Residual Rate ◽  
Fertilizer Nitrogen

Soil organic carbon (SOC) plays a critical role in rice production, but its feedback to the fate of fertilizer nitrogen (N) is not clear. In this study, a pot experiment was conducted to investigate the responses of rice yield and the fate of fertilizer N to different SOC levels using <sup>15</sup>N-labelled urea. The results showed that rice biomass, yield and the total N uptake increased significantly with increasing SOC content. Both rice N uptake from soil and urea increased significantly with increasing SOC content. The recovery rate and residual rate of fertilizer N improved significantly with increasing SOC content, leading to a reduced rate of not-specified fertilizer N. Therefore, it was concluded that high SOC could not only improve rice yield and fertilizer N recovery, but also could increase the retention of fertilizer N and decrease the not-specified N in the paddy soil.

Comparison of fertilizer nitrogen efficiency among field crops

1984 ◽  
Vol 30 (2) ◽  
pp. 199-208 ◽  
Author(s):  
Akira Tanaka ◽  
Junichi Yamaguchi ◽  
Shu Miura ◽  
Hiroyuki Tamaru
Keyword(s):  
Nitrogen Efficiency ◽  
Fertilizer Nitrogen ◽  
Field Crops

Nitrogen balance studies in rice using 15N-labelled urea and urea supergranules

1989 ◽  
Vol 113 (1) ◽  
pp. 119-121 ◽  
Author(s):  
S. K. Mohanty ◽  
S. P. Chakravorti ◽  
A. Bhadrachalam
Keyword(s):  
Nitrogen Balance ◽  
Rice Field ◽  
Nitrogen Efficiency ◽  
Seasonal Effects ◽  
Split Application ◽  
Deep Placement ◽  
Fertilizer Nitrogen ◽  
Urea Supergranules ◽  
The Poor ◽  
Different Types

Recovery of applied nitrogen by the rice crop is invariably low, often 30–50% (Prasad & De Datta 1979). The poor recovery has been attributed to different types of losses occurring in the rice field. Recovery improved with split application, delayed application or deep placement (Pillai & Vamadevan 1978; Craswell & Vlek 1979), indicating that the management factor plays an important role in increasing fertilizer nitrogen efficiency. To investigate such factors, and seasonal effects, field experimentswere carried out using 15N-labelled urea (PU) and urea supergranules (USG). The recovery of fertilizer 15N by the plant and retention in the soil were studied in both dry and wet seasons.

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