scholarly journals Rooting System of Rice Cultivated under System of Rice Intensification (SRI) Method which Improving Rice Yield

2018 ◽  
Vol 25 (2) ◽  
pp. 63
Author(s):  
Nurul Hidayati ◽  
Triadiati Triadiati ◽  
Iswandi Anas
Keyword(s):  
Conventional Method ◽  
Root Respiration ◽  
Rice Yield ◽  
Root Hairs ◽  
Plant Roots ◽  
System Of Rice Intensification ◽  
Aerenchyma Formation ◽  
Rice Plants ◽  
Rice Roots ◽  
Rice Intensification

The development of plant roots is known to play a very important role in the uptake of water and nutrients by rice plants. However, there are few studies on what changes, if any, are induced in the rooting systems of rice plants under System of Rice Intensification (SRI) management. This research evaluated changes of rice roots with SRI method compared to conventional method of irrigated rice cultivation and assessed influences that could improve rice yield. Under SRI management, plant roots were significantly longer and heavier than with conventional method. SRI method also increased the number of root hairs by 60%, and root hairs were healthier and more vigorous compared with conventional method. However, root respiration was not different in the two methods. There was less formation of aerenchyma (air pockets) in rice roots with SRI method, as both the number and size of root aerenchyma were lower with SRI than with conventional method. The SRI method was able to improve the root length, root dry weight compared to the conventional method. The SRI method was also able to increase the number of root hairs by 60% compared with the conventional method. Eh measurements in the soil with SRI method were higher than with conventional method. However, there was no significant different in root respiration. The aerenchyma formation of rice roots in SRI method was lower than conventional method.

scholarly journals Effects ofTrichodermaseedling treatment with System of Rice Intensification management and with conventional management of transplanted rice

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e5877 ◽  
Author(s):  
Ram B. Khadka ◽  
Norman Uphoff
Keyword(s):  
Grain Yield ◽  
Market Price ◽  
Crop Management ◽  
Growth And Yield ◽  
Yield Enhancement ◽  
System Of Rice Intensification ◽  
Soil Conditions ◽  
Rice Plants ◽  
Organic Cultivation ◽  
Rice Intensification

Many benefits ofTrichodermainoculation for improving crop production have been documented, including growth and yield enhancement and the alleviation of biotic and abiotic stresses. However, because rice is usually cultivated under continuous flooding that creates anaerobic soil conditions, this limits the benefits of these beneficial fungi. Cultivating rice with the methods of the System of Rice Intensification (SRI) provides rice plants with a more favorable environment for their colonization by beneficial microbes in the soil because the soil is more aerobic under SRI management and contains more organic matter. This study evaluated the effects ofTrichodermainoculation of rice plants under SRI management compared with transplanted and flooded rice plants, considering also the effects of different means of fertilization and different varieties in rice. Experiments were conducted in 2015 and 2016 under the tropical climate of Nepal’s western terai (plains) during both the rainy season (July to November) and the dry season (March to July). The results indicated significantly better performance (P = 0.01) associated withTrichodermainoculation for both seasons and for both systems of crop management in terms of grain yield and other growth-contributing factors, compared to non-inoculated rice cropping. Relatively higher effects on grain yield were recorded also with organic compared to inorganic fertilization; for unimproved (heirloom) varieties compared with improved varieties; and from SRI vs. conventional flooded crop management. The yield increase withTrichodermatreatments across all trials was 31% higher than in untreated plots (4.9 vs 4.5 mt ha−1). WithTrichodermatreatment, yields compared with non-treated plots were 24% higher with organic SRI (6.38 vs 5.13 mt ha−1) and 52% higher with non-organic SRI (6.38 vs 3.53 mt ha−1). With regard to varietal differences, under SRI managementTrichodermainoculation of the improved variety Sukhadhan-3 led to 26% higher yield (6.35 vs 5.04 mt ha−1), and with the heirloom variety Tilkidhan, yield was 41% higher (6.29 vs 4.45 mt ha−1). Economic analysis indicated that expanding the organic cultivation of local landraces under SRI management should be profitable for farmers where such rice has a good market price due to its premium quality and high demand and when SRI enhances yield. These varieties’ present low yields can be significantly increased by integratingTrichodermabio-inoculation with SRI cultural methods. Other recent research has shown that such inoculation can be managed profitably by farmers themselves.

Resource use efficiency in rice production under SRI and conventional method in Assam, India

2016 ◽  
Vol 36 (2) ◽  
Author(s):  
Ishani Parasar ◽  
J. P. Hazarika ◽  
Nivedita Deka
Keyword(s):  
Resource Use ◽  
Rice Yield ◽  
The State ◽  
Rice Production ◽  
System Of Rice Intensification ◽  
Resource Use Efficiency ◽  
Productivity Increase ◽  
Proper Training ◽  
Rice Intensification ◽  
Use Efficiency

To meet the rising demand for rice, the staple food in Assam, the production of rice has to be increased by many folds. Considering the shrinkage of agricultural lands, productivity increase is the only way out to increase the production. System of Rice Intensification (SRI) is reported to enhance rice yield to considerable extent. However, the acceptability of the method by the tradition rice growers of the state is a matter of concern. Further, the resource use status of SRI is yet to be studied systematically in Assam. The present study on resource use in SRI has shown that the resources used in SRI need to be increased for enhanced rice production the state. Awaring the farmers about SRI and imparting proper training on SRI would certainly help the farmers to increase their rice production to make them rice secured.

scholarly journals Estimating Rice Yield under Changing Weather Conditions in Kenya Using CERES Rice Model

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
W. O. Nyang’au ◽  
B. M. Mati ◽  
K. Kalamwa ◽  
R. K. Wanjogu ◽  
L. K. Kiplagat
Keyword(s):  
Solar Radiation ◽  
Grain Yield ◽  
Rice Yield ◽  
Weather Conditions ◽  
System Of Rice Intensification ◽  
Daily Maximum ◽  
Research Fields ◽  
Cropping Season ◽  
Development Data ◽  
Rice Intensification

Effects of change in weather conditions on the yields of Basmati 370 and IR 2793-80-1 cultivated under System of Rice Intensification (SRI) in Mwea and Western Kenya irrigation schemes were assessed through sensitivity analysis using the Ceres rice model v 4.5 of the DSSAT modeling system. Genetic coefficients were determined using 2010 experimental data. The model was validated using rice growth and development data during the 2011 cropping season. Two SRI farmers were selected randomly from each irrigation scheme and their farms were used as research fields. Daily maximum and minimum temperatures and precipitation were collected from the weather station in each of the irrigation schemes while daily solar radiation was generated using weatherman in the DSSAT shell. The study revealed that increase in both maximum and minimum temperatures affects Basmati 370 and IR 2793-80-1 grain yield under SRI. Increase in atmospheric CO2concentration led to an increase in grain yield for both Basmati and IR 2793-80-1 under SRI and increase in solar radiation also had an increasing impact on both Basmati 370 and IR 2793-80-1 grain yield. The results of the study therefore show that weather conditions in Kenya affect rice yield under SRI and should be taken into consideration to improve food security.

scholarly journals INFLUENC OF IRRIGATION PERIODS AND ORGANIC FERTILIZER ON TOW RICE VSRIETIES GROWN UNDER THE RSYSTEM OF RICE INTENSIFICATION (SRI)

2017 ◽  
Vol 48 (3) ◽  
Author(s):  
Al-Hasanie & Al-Maadhedi ◽  
Al-Hasanie & Al-Maadhedi
Keyword(s):  
Conventional Method ◽  
Water Consumption ◽  
Organic Fertilizer ◽  
Organic Manure ◽  
High Yield ◽  
System Of Rice Intensification ◽  
Research Station ◽  
Irrigation Interval ◽  
Panicle Number ◽  
Rice Intensification

A field trial was conducted at Al-Mishkhab Rice Research Station at Najaf Governorate during 2015 season to assess the effects of irrigation periods and organic manure on yield and its components of two local rice varieties (Anber 33, Jasmine) under System of Rice Intensification (SRI). The experiment was conducted using split split plot arrangement with RCBD design with three replicates. The main plots were irrigation methods where practiced: continuous submerge and intermittent water application where irrigation water was scheduled at two different intervals 3, 5 days. The sub plots were varieties (anber33,jasmin) and three amount of organic manures 0, 5, 10 ton.haˉ¹, planted under System of Rice Intensification (SRI) compared with conventional method (farmer practice). Transplanted method was done when (SRI) implemented and seedlings were transplanted by pattern square 25×25cm between other with one seedlings per hill and early transplanted 15 days seedling old. The conventional method were closed randomize space (10- 15)cm with more than one (3-5) seedlings, and late transplanted (30 days) seedling old. The results indicated that can be save amount of water and obtain of high yield by 29.5% with less water consumption by 57.6 % was used irrigation intervals of 3 days compared with continuance submerge, and then the amount of water consumption with 3 days interval was 3.67 mm equal 36.762 m³.haˉ¹, with 5 days interval 3.18 mm equal 31.869 m³.haˉ¹, with continuance submerge 8.66 mm equal 86.678 m³.haˉ¹. Also the results indicated that the water use efficiency (WUE) with irrigation interval 5 days was  31869 kg m-³ , with 3 days interval was  36762kg m-³ , with continuous submerge was  86678 kg m-³. The WUE Increase was with 3 days interval 70 %, and then the water consumption was reduced 2.2 compared with continuous submerge. The results indicated that there were significant differences with growth parameters (plant hight, and dry matter weight) and significant differences with yield and its components (Panicle number per m², grain number per panicle, 1000 grain weight, sterile percent, grain yield, and harvest index) when used 3 days intervals and 10 ton.haˉ¹ organic manure.

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