Effects of different nitrogen management models on agronomic characters and nitrogen fertilizer utilization efficiency of early rice

2010 ◽  
Vol 36 (2) ◽  
pp. 224-228
Author(s):  
Jian-wei PENG ◽  
Zhe-li DING ◽  
Qiang LIU ◽  
Xiang-min RONG ◽  
Chang TIAN ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Nitrogen Management ◽  
Utilization Efficiency ◽  
Agronomic Characters ◽  
Management Models ◽  
Early Rice

scholarly journals Effects of micro-nano bubble aerated irrigation and nitrogen fertilizer level on tillering, nitrogen uptake and utilization of early rice

2018 ◽  
Vol 64 (No. 7) ◽  
pp. 297-302 ◽  
Author(s):  
Sang Honghui ◽  
Jiao Xiyun ◽  
Wang Shufang ◽  
Guo Weihua ◽  
Salahou Mohamed Khaled ◽  
...  
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Fertilizer ◽  
N Uptake ◽  
Effective Means ◽  
Irrigation Treatment ◽  
Utilization Efficiency ◽  
Nitrogen Accumulation ◽  
Response Characteristics ◽  
Nitrogen Levels ◽  
Early Rice

In order to clarify the response characteristics of tillering and nitrogen (N) uptake and utilization under micro-nano bubble aeration irrigation and nitrogen fertilizer level, the nitrogen uptake and utilization characteristics, tillering and yield of early rice under different irrigation methods and nitrogen levels were investigated. The results showed that micro-nano bubble aerated irrigation and nitrogen fertilizer have substantial influence on tillering of early rice, and the effect of N fertilizer was greater than the effect of oxygen. Nitrogen accumulation increased by 6.75–10.79% in micro-nano bubble aerated irrigation treatment compared with the conventional irrigation. The application of N in treatment of micro-nano bubble aerated irrigation and 160 kg N/ha fertilizer used (W<sub>1</sub>N<sub>1</sub>) was 90% of the treatment of micro-nano bubble aerated irrigation and 180 kg N/ha fertilizer used (W<sub>1</sub>N<sub>2</sub>), while the yield decreased by only 0.31%. The study indicated that the adoption of an appropriate deficit N rate combine with micro-nano bubble aerated irrigation can be an effective means to reduce non-beneficial N consumption, achieve higher crop yield and N utilization efficiency.

scholarly journals Effect of Nitrogen Fertilizer on some Attributes of SorghumGrown in Saline Soil under Irrigation

2018 ◽  
Vol 1 (2) ◽  
pp. 12-17
Author(s):  
Abubaker Haroun M.Adam ◽  
Mohammed Ahmed Taleim
Keyword(s):  
Nitrogen Fertilizer ◽  
Cultural Practices ◽  
Agronomic Traits ◽  
Optimal Level ◽  
Agronomic Characters ◽  
College Of Agriculture ◽  
Nitrogen Levels ◽  
Significant Difference ◽  
Number Of Leaves ◽  
Sorghum Bicolor L

The main objective of this study was to investigate the effects of 4 levels of Nitrogen (N) fertilizer (0, 25, 50 and 75 Kg N/fed) on some attributes of Sorghum (Sorghum bicolor L). This study was conducted in the farm of College of Agriculture, University of Bahri-Sudan; during the period 2014-2015. Where the soil is classified as saline with pH ranging from 7.5 -7.8. A randomized completely block designed (RCBD); with 3 replications and four (4) treatments was adopted. All recommended cultural practices were carried out timely. Data; pertaining some plant attributes were collected and analyzed. The result showed that the application of 75KgN/fed has increased both; the average number of leaves as well as the plant height compared to other levels of Nitrogen fertilizer including the control (Figure 1, Figure 2). For the average number of tillers concern, there is non -significant difference between all Nitrogen levels and average number of tillers (Figure 3). The study concluded that the Nitrogen fertilizer has variable effects on the studied agronomic characters, and the application of 75kgN/fed is the optimal level of fertilizer for improving the agronomic traits of Sorghum under Alkadaro conditions.

scholarly journals Some Aspects of Nitrogen Management and Its Real Time Application in Direct Seeded Rice Using Leaf Color Chart

2018 ◽  
Vol 6 (2) ◽  
pp. 81-86
Author(s):  
Purushottam Subedi ◽  
Salina Panta
Keyword(s):  
Real Time ◽  
Nitrogen Fertilizer ◽  
Nitrogen Loss ◽  
Management Strategies ◽  
Nitrogen Management ◽  
Rice Crop ◽  
Leaf Color ◽  
Color Chart ◽  
Direct Seeded ◽  
Leaf Color Chart

Proper application of nitrogen (N) fertilizer is vital to improve the growth and grain yield of rice crop. As there prevails more aerobic period in direct seeded rice, nitrogen loss is generally more in such environment. Therefore, nitrogen recommendation for direct seeded rice is slightly higher (22.5-30 Kg ha-1) than that under the transplanted rice. Insufficient and/or inappropriate nitrogen fertilizer application is highly critical to the crops. Optimal nitrogen management strategies aim at matching the nitrogen fertilizer supply to the actual crop demand. Leaf color is generally used as a visual and subjective indicator of the rice crop need for nitrogen fertilizer. The Leaf Color Chart is a simple and inexpensive tool for real time nitrogen management in rice. It helps farmers to improve their decision-making process in nitrogen management. It provides the idea of when and how much nitrogen fertilizer to apply based on relative greenness of the rice leaf. In overall, LCC based nitrogen management improves productivity and profitability of the rice crop by nitrogen saving and ensuring its higher use efficiency.Int. J. Appl. Sci. Biotechnol. Vol 6(2): 81-86

Nitrogen management for zero‐till spring wheat: Disposition in plant and utilization efficiency

1993 ◽  
Vol 24 (17-18) ◽  
pp. 2223-2239 ◽  
Author(s):  
C. A. Campbell ◽  
F. Selles ◽  
R. P. Zentner ◽  
B. G. McConkey
Keyword(s):  
Spring Wheat ◽  
Nitrogen Management ◽  
Utilization Efficiency

scholarly journals Effects of Straw Return and Feed Addition on the Environment and Nitrogen use Efficiency in the Rice–Crayfish System

2021 ◽  
Author(s):  
Pengli Yuan ◽  
Mingli Ni ◽  
Cougui Cao ◽  
Ligeng Jiang ◽  
Anas Iqbal ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Compensation Effect ◽  
Fertilizer Application ◽  
Utilization Efficiency ◽  
Effective Utilization ◽  
Nitrogen Utilization Efficiency ◽  
Management Measures ◽  
Feed Addition ◽  
Straw Return ◽  
Use Efficiency

Abstract Purpose Understanding the direction of nitrogen flow in the rice-crayfish system (RC) and optimizing the rate of nitrogen fertilizer application (ORN) are of great significance for sustainable development of RC. Methods To this end, a field experiment involving straw and feed treatment was conducted to delineate the flow of the nitrogen present in the straw (straw-N) and feed (feed-N). Second, under different feed and straw treatments, we carried out a mesocosm experiment with different rates of 15N-labeled nitrogen fertilizer application to explore the optimal rate under the effects of feed-N and straw-N supply.Results The results showed that at 75 kg N ha-1(75N), 14% and 1.86% of feed-N and 4.3% and 8.78% of straw-N is absorbed by crayfish and rice, respectively. The percentage of feed-N and straw-N lost to the environment was the lowest at 75N, i.e., 84.48% and 86.92%, respectively. Using straw return to the field and feeding as the basic management measures for RC, we observed that the rice yield was the highest under 75N, and the highest nitrogen utilization efficiency (NUE) was 25%, and the highest the percentage of soil storing nitrogen by the fertilizer-derived was 34% (lost to the environment, at least 41%).Conclusions ORN could help in the effective utilization of feed-N and straw-N via a compensation effect, promote the absorption and transport of nitrogen, and ultimately lead to an improvement in NUE in RC.

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