scholarly journals Influence of Plant Densities and Age of Seedlings on Dry Matter Partitioning and Grain Yield Potential of Transplanted Rice (Oryza sativa L.)

2016 ◽  
Vol 3 (4) ◽  
pp. 51-55
Author(s):  
G. Vijayalaxmi ◽  
G. Sreenivas ◽  
P. Leela Rani ◽  
T. Ram Prakash
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Yield Potential ◽  
Dry Matter Partitioning ◽  
Transplanted Rice ◽  
Plant Densities

scholarly journals Effect of Plant Densities on Yield Potential of Nerica 10 Rice Variety (Oryza sativa L.) In Taita Taveta County

2021 ◽  
pp. 40-46
Author(s):  
Leah Andisi Akula ◽  
Esther Mwende Muindi ◽  
Lenard Gichana Mounde ◽  
Mwamburi Mcharo
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Block Design ◽  
Rice Variety ◽  
Yield Potential ◽  
Seeding Rate ◽  
Rain Season ◽  
Plant Densities ◽  
Yield Maximization

Rice (Oryza sativa L.), is an important cereal crop grown within central, western and coast region of Kenya. Despite annual rice consumption being higher than maize (Kenya’s staple food), the country is unable to meet an annual demand of 0.55 million tons and depends on imports to fill a 73% deficit. In order to contribute to reducing the deficit gap, a field experiment was conducted at Dembwa and Kipusi, Taita Taveta County in Kenya during the 2019 long rain season to find out the effect of spacing and seeding rate on performance of New Rice for Africa (Nerica) 10 rice variety. Three spacings 30 cm x 15 cm (control), 20 cm x 15 cm and 20 cm x 10 cm and four seedrates drill (random seed placement in small groove/line), 1, 2, or 3 seedling(qs) per hill were used. The experiment was laid out in a randomized complete block design, factorial arrangement with three replications. Results showed that the interaction between 20 cm x 10 cm spacing at single seedling per hill significantly (p ≤ 0.05) increased grain yield by 58%, dry biomass by 33% and harvest index by 45% compared to 20 cm x 15 cm and 30 cm x 15cm (control). These results suggest that interaction between 20 cm x 10 cm spacing at 1(one) seedling per hill is the best for Nerica 10 grain yield maximization in Taita Taveta County. The current investigation is among preliminary studies on Nerica 10 rice variety in the county. Therefore, there is need for long term trials in various agro environments in the County.

scholarly journals Productivity and nutrient use efficiency of hybrid rice (Oryza sativa L.) in response to integrated use of organic and inorganic sources of nutrients

2021 ◽  
Vol 17 (2) ◽  
pp. 390-403
Author(s):  
Dinesh Pandey ◽  
Anjum Ahmad ◽  
J.K. Chauhan ◽  
N. Pandey
Keyword(s):  
Growth Rate ◽  
Oryza Sativa ◽  
Grain Yield ◽  
Dry Matter ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Nutrient Use Efficiency ◽  
Inorganic Fertilizer ◽  
Nutrient Use ◽  
Use Efficiency

An experiment was carried out during the Kharif 2002 and 2003, to study the productivity and nutrient use efficiency of hybrid rice (Oryza sativa L.) in response to integrated use of organic and inorganic sources of nutrients at Research farm, IGAU, Raipur (CG). In all 12 treatments, comprising of different N, P and K levels and its conjunction with organic fertilizers were laid out in Randomized Block Design with 3 replications. The results revealed that application of inorganic fertilizer level of 150:80:60 kg NPK ha-1 significantly increased number of active leaf, leaf area, leaf area index and dry matter accumulation at later stages as compared to lower level of inorganic fertilizer. The conjunction of 100:60:40 kg NPK ha-1 along with PM or N blended with CDU found to be equally effective to that of inorganic fertilizer level of 150:80:60 kg NPK ha-1 for above growth parameters. The chlorophyll content during crop period under above level was the highest under said treatment. The highest crop growth rate was observed between 60-90 DAT followed by 90 DAT-harvest and 30-60 DAT, respectively. The per day accumulation of dry matter during 60-90 DAT period was almost three to four times of that accumulated during 30-60 DAT. Thereafter growth rate almost declined till maturity during both the years.The increased concentration of N at different growth stages and its uptake by plant helped in increasing the yield components and grain yield. The critical analysis of grain yield observations revealed that conjunction of lower levels of inorganic fertilizer (100:60:40 or 50:30:20 kg NPK ha-1) along with CDU or PM gave the saving of 50 kg N, 20 kg P and 20 kg K ha-1 for the cultivation of hybrid rice. Moreover, the higher buildup of available N and K has been also observed under said combination of organic and inorganic fertilizer treatments. The application of 150:80:60 kg NPK ha-1 along with PSB gave the highest buildup of available phosphorus. Inorganic level of 150:80:60 kg NPK ha-1 gave the highest production efficiency and productivity rating index, which was followed by application of inorganic fertilizer of 100:60:40 kg NPK ha-1 along with PM and blending of N with CDU, respectively. The application inorganic fertilizer of 50:30:20 kg NPK ha-1 + PM gave the highest nutrient efficiency during both the years. The highest input cost, net profit and per rupee investment was found under 150:80:60 kg NPK ha-1 followed by application of 100:60:40 kg NPK ha-1 along with PM.

The role of potassium solubilizing bacteria (KSB) inoculations on grain yield, dry matter remobilization and translocation in rice (Oryza sativa L.)

2019 ◽  
Vol 42 (10) ◽  
pp. 1165-1179 ◽  
Author(s):  
Mohammad Yaghoubi Khanghahi ◽  
Hemmatollah Pirdashti ◽  
Heshmatollah Rahimian ◽  
Ghorbanali Nematzadeh ◽  
Mehdi Ghajar Sepanlou
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Potassium Solubilizing Bacteria

scholarly journals Assessment of triasulfuron on weed dynamics and yield of transplanted rice (Oryza sativa L.)

2018 ◽  
Vol 10 (3) ◽  
pp. 935-938
Author(s):  
Samartha Tewari ◽  
Rohitashav Singh ◽  
Anil Nath ◽  
Deepak Pandey
Keyword(s):  
Oryza Sativa ◽  
Field Experiment ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Block Design ◽  
Growth Period ◽  
Metsulfuron Methyl ◽  
Transplanted Rice ◽  
Broad Leaf ◽  
Weed Dynamics

A field experiment was managed during kharif season of 2014 in G. B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) to assess the outcome of applying dissimilar rates of triasulfuron on the  transplanted rice (Oryza sativa L.) associated weeds. Treatments composed of triasulfuron at three different rates, metsulfuron methyl, ethoxysulfuron, 2, 4-D with 2 checks (weed free and untreated). Experiment was carried out in Randomised block Design with 8 treatments and 3 replications. Grassy weeds, broad leaf weeds and sedges were observed during the crop growth period. Triasulfuron at 12 g ha-1 proved most efficient in controlling weeds at 60 and 90 days after transplanting (DAT) with 44.4 % and 59.6 % WCE respectively. Minimum weed dry matter (65.1 g m2) was observed with triasulfuron at 12 g ha-1. Out of all the herbicidal treatments, triasulfuron at 12 g ha-1 gave the paramount grain yield of rice (5786 kg ha-1) which was significantly surpassing all other herbicidal treatments, while it was minimum in metsulfuron methyl at 4 g ha-1 (4417 kg ha-1).

scholarly journals Combined effect of land preparation methods and planting geometry on the performance of machine transplanted rice (Oryza sativa L.)

2016 ◽  
Vol 8 (4) ◽  
pp. 1855-1860
Author(s):  
R. B. Negalur ◽  
A. S. Halepyati ◽  
B. G. Masthanaredy
Keyword(s):  
Oryza Sativa ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Research Station ◽  
Dry Matter Accumulation ◽  
Preparation Methods ◽  
Area Index ◽  
Land Preparation ◽  
Transplanted Rice ◽  
Planting Geometry

Field experiment on effect of land preparation methods and planting geometry on growth and yield of machine transplanted rice (Oryza sativa L.) was conducted at Agricultural Research Station, Gangavathi, University of Agricultural Sciences, Raichur, Karnataka during kharif, 2012 and 2013 in clay soil under irrigated condition.Pooled mean indicated that, among the different land preparation methods and planting geometry puddling with rotovator fb levelling with spike tooth harrow and planting geometry of 30 x 21 cm recorded significantly higher growth parameters viz., Leaf area index ( 2.87 and 1.56, respectively) , dry matter accumulation in leaves (13.44 and 14.43 g plant-1, respectively), dry matter accumulation in stem (26.25 and 29.31 g plant-1 , respectively), dry matter accumulation in panicles ( 37.21 and 41.38 g plant-1 , respectively), total dry matter accumulation in plant (73.82 and 85.12 g plant-1, respectively), thousand grain weight (18.17 and 18.71,g respectively), grain yield (4906 and 5192 kg ha-1 , respectively), straw yield (6247 and 6508 kg ha-1, respectively), gross returns (Rs. 87,733 and 92779 ha-1, respectively), net returns (Rs. 46329 and 50007 ha-1) and benefit cost ratio (2.14 and 2.20 ). Puddling with rotovator fb levelling with spike tooth harrow and 30 x 21 cm spacing were found better for transplanting of rice by self propelled mechanical transplanter. Land preparation would be helpful as one of the important pre requirement in machine transplanting of rice, which in turn will decide the time (time required for settling of soil particle) and type of machine to be used for transplanting of rice.

scholarly journals Effect of Planting Techniques and Nutrient Management Options on Crop Productivity and Soil Health of Wet Rice (Oryza sativa L) in Typic Ustochrept Soils

2021 ◽  
pp. 39-54
Author(s):  
M. Sharath Chandra ◽  
R. K. Naresh ◽  
. Vivek ◽  
S. P. Singh ◽  
. Purushottam ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Organic Carbon ◽  
Grain Yield ◽  
Management Practices ◽  
Nutrient Management ◽  
Oryza Sativa L ◽  
Soil Health ◽  
Management Options ◽  
Straw Yield ◽  
Transplanted Rice

A two years field experiment was carried out in sandy loam soil during rainy (Kharif) seasons in 2019-2020 at CRC farm of sardar vallabhbhai patel university of agricultural & technology, Meerut, Uttar Pradesh to evaluate the various Planting techniques and integrated nutrient management on yield and soil health of rice (Oryza sativa L.) under rice- wheat copping system. The treatments comprised of two Planting techniques i.e., E1-Conventional puddled transplanted rice (CT- TPR), E2- Wide bed Transplanted rice (W Bed-TPR) and Nine Nutrient management practices {N1- Control, N2- 100% RDF + ZnSO4 25 kg ha-1, N3- 125% RDN + ZnSO4 25 kg ha-1, N4- STCR based NPK application + ZnSO4 25 kg ha-1, N5- N2+ FYM  (5 t ha-1), N6- N2+ FYM  (5 t ha-1) + PSB (5 kg ha-1)+ Azotobactor 20 kg ha-1, N7- 75% RDN + FYM (5 t ha-1) + ZnSO4 25 kg ha-1, N8-75% RDN + FYM (5 t ha-1) + PSB (5 kg ha-1) + Azotobactor 20 kg ha-1 +  ZnSO4 25 kg ha-1, N9- Organics Practices @ FYM (30 t ha-1)+PSB (5 kg ha-1) + Azotobactor 20 kg ha-1 + ZnSO4 25 kg ha-1} are laid down in Factorial Randomized block design and replicated thrice. The results indicated that among the different Planting techniques (PTs), conventional puddled transplanted rice (E1, CT-TPR) was recorded significantly higher grain yield (40.4 & 41.3 q ha-1), straw yield (62.7 & 63.8  q ha-1), NPK content and uptake and also improved soil health status ie., available NPK, organic carbon and other physical properties i.e, Bulk density, EC, pH  in soil than wide bed transplanted rice (E2, W Bed-TPR) during both years of kharif 2019 & 2020 respectively. Among the nutrient management practices, the N6 (100% RDF + ZnSO4 25 kg ha-1 + FYM  (5 t ha-1) + PSB (5 kg ha-1)+ Azotobactor 20 kg ha-1 ) treatment produced significantly higher grain yield (49.0 & 50.2 q ha-1), straw yield (81.2 & 82.8 q ha-1), NPK content and uptake, and available NPK organic carbon in soil than the other treatments, which were comparable to the N3 (125% RDN + ZnSO4 25 kg ha-1) treatment and the lowest in the control treatment  N1, respectively. Thus, the results suggest that inclusion of inorganic fertilizer along with organic manure (FYM) enhanced the rice yield Therefore, application of conventional puddled transplanted rice (E2, CT-TPR) along with N6 (100% RDF + ZnSO4 25 kg ha-1 + FYM  (5 t ha-1) + PSB (5 kg ha-1)+ Azotobactor 20 kg ha-1 ) found beneficial to increase productivity and soil health of rice crop.

scholarly journals Response of Root Characteristics and Dry Matter Partitioning in 40 Improved and Local Rice (Oryza sativa L.) Genotypes under Deficit Irrigation

2017 ◽  
Vol 9 (22) ◽  
pp. 63-72 ◽  
Author(s):  
Seyedeh Arhameh Fallah-Shamsi ◽  
Hemmatollah Pirdashti ◽  
Aliakbar Ebadi ◽  
Masoud Esfahani ◽  
Mahmood Raeini ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Deficit Irrigation ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Root Characteristics ◽  
Dry Matter Partitioning

scholarly journals Effect of heat stress on yield and economics of rice (Oryza sativa L.) cultivars under different sowing dates

2021 ◽  
Vol 23 (1) ◽  
pp. 38-45
Author(s):  
S.MOHAPATRA ◽  
S.K.TRIPATHY ◽  
A.K.MOHANTY ◽  
S.TRIPATHY
Keyword(s):  
Oryza Sativa ◽  
Heat Stress ◽  
Grain Yield ◽  
Temperature Stress ◽  
Dry Matter ◽  
Rice Yield ◽  
Oryza Sativa L ◽  
Reproductive Growth ◽  
Sowing Dates ◽  
Use Efficiency

An experiment was carried out during rabi 2017-18 and 2018-19 at Regional Research and Technology Transfer Station, Chiplima, Sambalpur, Odisha of Odisha University of Agriculture and Technology to study the influence of temperature stress at different sowing dates to on yield attributing characters, yield and economics of rice (Oryza sativa L.) cultivars. Rice sown on 10th December utilizedmore thermal and heat units as compared to 30th December and 10th January sown crop. The differential yield response of cultivars to various sowing dates was found to be due to their differential tolerance against high temperature at reproductive growth phase. On an average, 15.7 to 25% reduction in rice yield was obtained in case of sowing dates where temperature stress coincided with reproductive growth phase. The crop sown on 10th December took maximum growing degree days units to attain differentphenological stages till physiological maturity. Number of grains panicle-1 and rice yield increased with delay in sowing time up to 30th December, whereas there was a decrease in duration and tillers m-2. December 30 sown rice registered the highest grain yield (7.3 t ha-1), grain yield heat use efficiency (3.2 kg ha-1 0C day-1) and dry matter heat use efficiency (6.8 kg ha-1 0C day-1). Maximum number of grains panicle-1, grain yield, grain yield heat use efficiency, dry matter heat use efficiency and benefit cost ratio of rice cultivar MTU 1156 sown on 30th December seems to be associated with non-coincidence of their reproductive growth period with heat stress and seedling growth periods with cold stress. Cultivar MTU 1001 showed moderate tolerance to temperature stress and thus recorded lower heat susceptibility index (0.65) and higher yield stability ratio (84.5).

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