Dry-seeded and aerobic rice cultivation T. Parthasarathi, Ben-Gurion University of the Negev, Israel; Tamil Nadu Agricultural University, India; A. Tariq, University of Copenhagen, Netafim Irrigation Ltd, Israel

2017 ◽  
pp. 137-152
Keyword(s):  
Tamil Nadu ◽  
Rice Cultivation ◽  
Aerobic Rice

Diagnosis and management of green algae in low land paddy fields of Cauvery delta zone, Tamil Nadu

2021 ◽  
Vol 58 (1) ◽  
pp. 33-42
Author(s):  
M Jeya Bharathi ◽  
M Raju ◽  
S Elamathi
Keyword(s):  
Green Algae ◽  
Tamil Nadu ◽  
Rice Cultivation ◽  
Rice Root ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Green Algal ◽  
Algae Growth ◽  
Cauvery Delta ◽  
Soil And Water

Rice is a prime food crop for Asian countries. Wet land rice cultivation contributes maximum grain yield than dry land rice. Cauvery delta is a predominant area for rice cultivation in Tamil Nadu. Green algae growth during Kuruvai (June -August) season is a serious problem in wet land rice. These algae growth create anaerobic condition and prevent rice root respiration. The entire rice root was uprooted and floated on the stagnated water during initial stage. There is no preliminary study for green algae control in rice field. Soil and water samples were collected and analyzed for the nature of occurrence. Laboratory and field experiments were conducted to find out the remedial measures. The results of soil and water sample analysis showed that use of bore well water and dumping of phosphatic fertilizers leads to salt accumulation which favours the green algal growth. The results of the laboratory experiment revealed that the CuSO4 londox power, propiconazole and hexaconazole showed moderate inhibition on 5th day after treatment. The findings from field experiment indicated that use of conoweeder, alternate wetting and drying and CuSo4 drenching @ of 2.5 kg/ha when green algae appearance has just noticed or 5.0 kg/ha when severe growth occurred was effective in managing the green algae. Among all measures, alternate wetting and drying is the best management practices. CuSO4 drenching reduces around 70% of the growth. Even though CuSO4 react negatively with algae growth, soil pH changes and salt concentration play a major role on the CuSO4 action towards green algae. In order to maintain soil health condition, biofertilizer application, crop rotation, green manure trampling to be practised to recover the soil from alkaline pH, removal of accumulated salt and to control the algae growth using CuSO4.

scholarly journals Studies on nitrogenase activity of diazotrophic isolates from different rice production systems

2016 ◽  
Vol 8 (1) ◽  
pp. 284-289
Author(s):  
S. Kanimoli ◽  
K. Kumar
Keyword(s):  
Acetylene Reduction ◽  
Tamil Nadu ◽  
Production Systems ◽  
Nitrogenase Activity ◽  
Rice Production ◽  
Lowland Rice ◽  
Aerobic Rice ◽  
Marked Variation ◽  
Reduction Assay ◽  
First Time

The present study was carried out to evaluate the nitrogen fixing ability of diazotrophs isolated from the rhizosphere soils of rice which were grown in three different rice growing systems. A total of hundred and ten isolates obtained were subjected to Acetylene Reduction Assay (ARA) and ninety eight isolates recorded significant amount of nitrogenase activity in a range of 185.73 to 3794.55 nmoles of ethylene mg of protein-1 h-1. The highest nitrogenase activity was recorded by Derxia (3794.55 nmoles of ethylene mg of protein-1 h-1) isolated from Trichy (lowland). Among the three different rice production systems, isolates obtained from lowland rice (Derxia – 3794.5 nmoles of ethylene mg of protein-1 h-1) recorded higher nitrogenase activity followed by Aerobic (Pseudomonas - 2194.89 nmoles of ethylene mg of protein-1 h-1) and SRI (Azotobacter - 1971.85 nmoles of ethylene mg of protein-1 h-1) rice isolates. The results revealed marked variation in the ARA of the diazotrophic isolates obtained from lowland, SRI and Aerobic rice. The nitrogenase activity of diazotrophs from rice fields have been reported earlier but the nitrogenase activity of diazotrophs from three different rice production systems from various parts of Tamil Nadu is reported for the first time from India.

Dry-seeded and aerobic rice cultivation

2017 ◽  
pp. 105-120
Author(s):  
T. Parthasarathi ◽  
◽  
M. Kokila ◽  
D. Selvakumar ◽  
V. Meenakshi ◽  
...  
Keyword(s):  
Rice Cultivation ◽  
Aerobic Rice

scholarly journals Impact of Aerobic Rice Cultivation on Growth, Yield, and Water Productivity of Rice-Maize Rotation in Semiarid Tropics

2012 ◽  
Vol 104 (6) ◽  
pp. 1757-1765 ◽  
Author(s):  
M. D. M. Kadiyala ◽  
R. S. Mylavarapu ◽  
Y. C. Li ◽  
G. B. Reddy ◽  
M. D. Reddy
Keyword(s):  
Water Productivity ◽  
Growth Yield ◽  
Rice Cultivation ◽  
Aerobic Rice ◽  
Semiarid Tropics

scholarly journals Resource Use Efficiency Among Aerobic and Conventional Rice Farms in Eastern Dry Zone of Karnataka: A Comparative Analysis

2021 ◽  
Vol 66 (3) ◽  
Author(s):  
Thejaswi Kumar
Keyword(s):  
Resource Use ◽  
Optimal Allocation ◽  
Rice Cultivation ◽  
Farm Size ◽  
Aerobic Rice ◽  
Resource Use Efficiency ◽  
Cross Sectional ◽  
Conventional Farms ◽  
Dry Zone ◽  
Use Efficiency

The efficiency with which farmers use available resources is very important for agricultural production. This study examines the comparative resource use efficiency (RUE) between aerobic and conventional rice farms in Eastern Dry Zone (Zone-5) of Karnataka. Cross-sectional data were collected from 100 rice cultivating farmers (50 in Aerobic farms and 50 in Conventional farms) using snow ball sampling technique. Cobb-Douglas production function, Marginal analysis of resource utilization, Data Envelopment Analysis (DEA) were some of the analytical tools used in the study. The mean aerobic farm size was 0.43 ha while in Conventional rice, it was 0.63 ha. The physical water use efficiency (WUE) in aerobic farms (3.84 q/acre inch) was higher than conventional farms (1.64 q/acre inch). Also, the economic WUE was higher in aerobic farms (1643.54 `/acre inch) compared to conventional farms (269.41 `/acre inch). RUE indicated that, resources were not optimally utilized in both Aerobic Rice Cultivation (ARC) and Conventional Rice Cultivation (CRC). Bullock labour, machine labour, seeds and irrigation were underutilized in ARC, whereas, FYM was underutilized in CRC indicating that usage of additional amount of these inputs leads to increase in the returns. The DEA revealed that aerobic rice cultivating farms were more technically and economically efficient compared to conventional rice cultivating farms. Effective policies to promote and create awareness about aerobic rice can boost the rice production and productivity sustainably. The focus should be given to optimal allocation of resources which enhances the farm productivity and returns

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