scholarly journals Response of rain-fed lowland rice varieties to different sources of N fertilizer in Fogera Plain, Northwest Ethiopia

2019 ◽  
Vol 5 (1) ◽  
pp. 1707020
Author(s):  
Amare Aleminew ◽  
Getachew Alemayehu ◽  
Enyew Adgo ◽  
Tilahun Tadesse ◽  
Manuel Tejada Moral
Keyword(s):  
Northwest Ethiopia ◽  
N Fertilizer ◽  
Lowland Rice ◽  
Rice Varieties ◽  
Different Sources

Screening and comprehensive evaluation of rice (Oryza sativa L. subsp. japonica Kato) germplasm resources for nitrogen efficiency in Xinjiang, China

2020 ◽  
Vol 18 (3) ◽  
pp. 179-189
Author(s):  
Chunping Jia ◽  
Fengbin Wang ◽  
Jie Yuan ◽  
Yanhong Zhang ◽  
Zhiqiang Zhao ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Relative Yield ◽  
N Fertilizer ◽  
Nitrogen Efficiency ◽  
Environment Interaction ◽  
Germplasm Resources ◽  
Rice Varieties ◽  
N Application ◽  
N Efficiency ◽  
Panicle Number

AbstractComprehensive screening of rice (Oryza sativa L. subsp. japonica Kato) germplasm resources with different nitrogen (N) efficiency levels is effective for improving N use efficiency (NUE) while reducing pollution and providing high quality, yield, and efficiency agriculture. We investigated 14 indices of 38 varieties under three N application levels to assess differences among genotypes. Rice varieties were classified for screening and identifying N efficient. Descriptive statistical analysis results indicated significant differences in relative yield, and also in NUE indices (agronomic utilization rate and partial productivity of N fertilizer). The genotype main effects and genotype–environment interaction effects (GGE) biplot analysis was used to evaluate suitable varieties, compare the stable and high yield capabilities of different varieties, find the ideal variety, and describe the correlation, discrimination and representativeness of the indices under different N application levels. Descriptive statistical, discrimitiveness and representativeness and factor analysis were used to select indices, in which the panicle number per plant and soil and plant analyzer development (SPAD) value were the key indices for evaluation and identification. Heatmap and hierarchical cluster analysis based on the average value of evaluation indices, and scatter plot based on the comprehensive value of N efficiency (P) according to formula showed that all varieties could be divided into five types under different N treatments. Our findings work toward developing N efficient rice varieties to improve NUE, reduce N fertilizer application and thus N waste, consequently mitigating the effects of rice production on the environment to ensure food security and sustainable agricultural development.

scholarly journals Analysing the effect of paddy rice variety on fluorescence characteristics for nitrogen application monitoring

2018 ◽  
Vol 5 (6) ◽  
pp. 180485 ◽  
Author(s):  
Chaoyong Shen ◽  
Zhongke Feng ◽  
Daoqin Zhou
Keyword(s):  
Rice Variety ◽  
Paddy Rice ◽  
N Fertilizer ◽  
Experimental Results ◽  
Rice Varieties ◽  
Growth Status ◽  
Fluorescence Characteristics ◽  
Key Factor ◽  
Leaf N Content ◽  
The Relationship

Paddy rice is one of the most important cereal crops worldwide, so it is very important to accurately monitor its growth status and photosynthetic efficiency. The nitrogen (N) level is a key factor closely related to crop growth. In this study, laser-induced fluorescence (LIF) technology combined with multi-variate analysis was applied to investigate the effect of paddy rice variety on N fertilizer level monitoring. Principal components analysis was conducted to extract the variables of the main fluorescence characteristics to identify N levels. Experimental results demonstrated that no nitrogen fertilizer can be completely identified for each paddy rice variety. In addition, other N levels can also be well classified based on the fluorescence characteristics. The relationship between the fluorescence ratio (F735/F685 : F735, and F685 denote the fluorescence intensity at 735 nm, and 685 nm, respectively) and leaf N content of different paddy rice varieties is also discussed. Experimental results revealed that LIF technology is an effective method of monitoring the N fertilizer and leaf biochemical components of paddy rice.

INFLUENCES OF PHOSPHORUS DEFICIENCY ON THE UPTAKE OF NITROGEN, POTASSIUM, CALCIUM, MAGNESIUM, SULFUR, AND ZINC IN LOWLAND RICE VARIETIES

2001 ◽  
Vol 24 (10) ◽  
pp. 1621-1632 ◽  
Author(s):  
M. A. Saleque ◽  
M. J. Abedin ◽  
Z. U. Ahmed ◽  
M. Hasan ◽  
G. M. Panaullah
Keyword(s):  
Phosphorus Deficiency ◽  
Lowland Rice ◽  
Rice Varieties ◽  
Calcium Magnesium

Optimum sowing date and nitrogen fertilizer rate for rice varieties under intermediate deepwater conditions (15–50 cm)

1992 ◽  
Vol 118 (2) ◽  
pp. 179-183 ◽  
Author(s):  
A. R. Sharma ◽  
M. D. Reddy
Keyword(s):  
Sowing Date ◽  
N Fertilizer ◽  
Fertilizer Rate ◽  
Rice Varieties ◽  
Excess Water ◽  
Nitrogen Fertilizer Rate ◽  
Crop Stand ◽  
Intermediate Deepwater ◽  
Better Than ◽  
Dwarf Type

SUMMARYIn an intermediate deepwater situation (15–50 cm) at Cuttack, India, three improved high-yielding rice varieties, Utkalprabha (semi-tall), CR 292–8051 (intermediate tall) and Gayatri (semi-dwarf) were sown on 20 May, 30 May and 10 June in 1988 and 1989 with an application of either 0, 20 or 40 kg N/ha at sowing. Tall varieties performed better than the dwarf type but grain yield decreased with delay in sowing. The early-sown crops (20–30 May) germinated with pre-monsoon rains and were established well before water accumulated in the field from mid-June onwards. The late-sown crops (10 June), despite good initial germination, could not withstand immediate waterlogging. The tall variety, Utkalprabha, elongated faster with rising water level and escaped complete submergence; whereas the semi-dwarf Gayatri failed to withstand such extreme excess water stress. Application of N fertilizer up to 40 kg/ha proved beneficial to the crops sown by the end of May. However, with crops sown on 10 June, the application of N could not compensate for the loss in yield due to an inadequate initial crop stand. Therefore, early sowing of tall varieties by the end of May along with a basal application of N fertilizer is recommended for higher productivity of rice under excess water conditions.

scholarly journals Assessment of genetic variability in lowland rice varieties of Odisha

2019 ◽  
Vol 10 (3) ◽  
pp. 1079
Author(s):  
Pinaky Dey ◽  
Simanchal Sahu ◽  
Rajesh Kumar Kar
Keyword(s):  
Genetic Variability ◽  
Lowland Rice ◽  
Rice Varieties

scholarly journals KERAGAAN USAHATANI VARIETAS UNGGUL BARU (VUB) PADI SAWAH DENGAN POLA PENGELOLAAN TANAMAN TERPADU (PTT):Studi Kasus di Desa Aneuk Glee Kecamatan Indrapuri Nanggroe Aceh Darussalam

2010 ◽  
Vol 9 (2) ◽  
pp. 166-174
Author(s):  
Emlan Fauzi ◽  
Apri Andani
Keyword(s):  
Crop Management ◽  
Integrated Approach ◽  
Farming System ◽  
Lowland Rice ◽  
Rice Farming ◽  
Rice Varieties ◽  
Integrated Crop Management ◽  
Field Assessment ◽  
New Varieties ◽  
The Village

This research aims to determine the performance of new varieties of farm (VUB), lowland rice through an integrated approach to crop management (ICM) in the village of Gle Aneuk Indrapuri, Aceh Besar District. Field assessment is from cooperative farmers who have lowland rice varieties with treatment, such as Cimelati, Bondoyudo, Ciherang, Kalimas, VUTB Fatmawati and IR-64. In each of these rice varieties applied packages introduced PTT technology. The result indicates that reviewed the six varieties suitable for cultivated and developed. Judging from the performance of agronomic VUTB Fatmawati better compared with 5 other varieties. VUTB Fatmawati have the greatest production (7.75 tonnes / ha) with a profit-making Rp.6.074.750, -. Fatmawati lowland rice farming system with ICM pattern is more feasible to be developed because the RC has the largest ratio (2.09) compared with the varieties Cimelati (2,06), Kalimas (2,04), Bondoyudo (2,02), Ciherang (1,51) and varieties of IR-164 (1,39).Key words: farming, rice, varieties, integrated crop management  

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