scholarly journals Effect of Salinity on Emergence and Early Growth Stages of Aromatic and Non-Aromatic Rice (Oryza sativa L.) Genotypes

2021 ◽  
Vol 64 (1) ◽  
pp. 64-74
Author(s):  
Ghulam Sarwar Channa ◽  
Abdul Razak Mahar ◽  
Lnayatullah Rajpar ◽  
Abdul Hafeez Memon ◽  
Muneer Ali Bhagat ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Early Growth ◽  
Yield Reduction ◽  
Growth Stages ◽  
Dry Matter Yield ◽  
Randomized Design ◽  
Rice Genotypes ◽  
Improved Performance

Salinity hampers the production of many field crops in the region including rice (Oryza sativa L.), while commonly classified as salt sensitive within the same species, the level of sensitivity varies between genotypes. This study investigated the salinity tolerance of 28 rice genotypes, including 9 aromatics and 19 non-aromatics. Sixty seeds of each genotype were initially sown in trays (24x18 inches) during the 1st week of June, by of using four salt treatments (0, 40, 80 and 120 mM NaCl+CaCl2 @ 20:1). The experiment was laid down in a completely randomized design with four replicates in laboratory conditions, at Shah Abdul Latif University Khairpur, Sindh, for the period of twenty-five days. A significant reduction in agro-morphological parameters was observed against all salinity levels. Based on reduction in dry matter yield, all rice genotypes were found tolerant at 40 mM. Eleven rice genotypes were found tolerant, fourteen were moderately tolerant, one was moderately sensitive and remaining two genotypes were found sensitive at 80 mM salinity level. Furthermore, none of the genotypes were able to with stand 120 mM of salinity. The genotypes Khushboo, DR-83 and Mahek performed meager and showed more than 50% reduction over control and categorised as sensitive, with the genotypes Latifee, DR-67 and DR-92, DR-51 and  IR-6 are categorised as tolerant with a reduction of less than 20% over control based on dry matter yield reduction against all salinity treatments at the early seedling stage. However, these genotypes cannot be justified as tolerant only on the basis of their improved performance at early growth stage. Hence, these genotypes are suggested to be studied further at other advanced growth stages up to maturity to evaluate their response under a saline environment.    

scholarly journals Effect of Salt Stress on Germination and Growth Parameters of Rice (Oryza sativa L.)

2014 ◽  
Vol 6 (2) ◽  
pp. 237-243 ◽  
Author(s):  
Akinbode Foluso OLOGUNDUDU ◽  
Adekunle Ajayi ADELUSI ◽  
Richard Olutayo AKINWALE
Keyword(s):  
Oryza Sativa ◽  
Root Length ◽  
Dry Matter ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Dry Weight ◽  
Yield Reduction ◽  
Growth Stages ◽  
Dry Matter Yield ◽  
Rice Varieties

The response of eight varieties of Oryza sativa L. (‘NERICA 1’, ‘NERICA 5’, ‘NERICA 12’, ‘NERICA 19’, ‘IR 29’, ‘IR 20’, ‘IWA 11’, and ‘POKKALI’, a salt tolerant check) against four salinity levels (0, 5, 10, and 15 ds m-1) were studied at germination and early growth stages. Data were analyzed using Statistical Analytical System (SAS) and means were separated by Duncan Multiple Range Test (DMRT) for Final Germination Percentage (FGP), Speed of Germination (SG), Germination Energy Percentage (GE%), shoot and root length and root and shoot dry weight. Based on dry matter yield reduction, rice varieties were classified as tolerant (T), moderately tolerant (MT), moderately susceptible (MS) or susceptible (S). Germination was not recorded at 20 ds m-1 salt concentration in all cultivars. Salinity decreased FGP, SG, GE% and led to reduction in shoot and root length and dry weight in all varieties and the magnitude of reduction increased with increasing salinity stress. Rice varieties ‘NERICA 12’, ‘IR 20’, ‘IWA 11’ and ‘NERICA 19’ showed greater salt tolerance during germination (germinated at 10 ds m-1 salinity). However, ‘NERICA 1’, ‘IR 29’, and ‘IR 20’ performed better based on dry matter yield reduction. The result suggested that ‘NERICA 1’, ‘IR 29’, and ‘IR 20’ might be used for further study of salinity effect on growth processes and physiological consequences at advanced stage of growth. The physiological responses of rice plants to salinity at various developmental stages are therefore critical for identifying salinity tolerance in the cultivars.

scholarly journals Screening of Rice (Oryza sativa L.) Genotypes at Reproductive Stage for their Tolerance to Salinity

2018 ◽  
Vol 16 (1) ◽  
pp. 65-77
Author(s):  
M M Islam ◽  
M H Faruqe ◽  
M S Rana ◽  
M Akter ◽  
M A Karim
Keyword(s):  
Oryza Sativa ◽  
Salt Tolerance ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Saline Water ◽  
Coastal Zones ◽  
Salt Tolerant ◽  
Randomized Design ◽  
Rice Genotypes ◽  
Four Levels

Soil salinity is one of the most devastating environmental stresses for rice production in the coastal areas of Bangladesh. Improvement in salt tolerance of rice is an important way for the economic utilization of coastal zones. An experiment was conducted at the vinyl house of the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during December 2016 to April 2017 to determine the effects of different salinity levels on the yield and yield components of some rice (Oryza sativa L.) genotype sand finally, screening of rice genotypes for salt tolerance. The experiment containing four treatments was laid out in a complete randomized design with five replications. The treatments were four levels of saline water with electrical conductivities at control (0.3 dSm-1), 5, 10 and 15dSm-1. Based on screening at germination stage, relatively salt-tolerant eleven genotypes with two check varieties were used in this experiment. The study showed that increase in salinity level significantly decreased yield and yield contributing characters of rice. However, among the eleven, three genotypes (Chapali, Patnai 23 and Soloi) were considered as moderately salt tolerant at 15 dSm-1 on the basis of their yields and yield contributing characteristics such as plant height reduction, total tiller reduction, effective tiller reduction, reduction of fertile grains per panicle, grain yield and relative grain yield. Therefore, Chapali, Patnai 23 and Soloi might be recommended as moderately salt tolerant rice genotypes. The Agriculturists 2018; 16(1) 65-77

scholarly journals Influence of Lime and Phosphorus Application Rates on Growth of Maize in an Acid Soil

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Peter Asbon Opala
Keyword(s):  
Dry Matter ◽  
Acid Soil ◽  
Interactive Effects ◽  
Available P ◽  
Dry Matter Yield ◽  
Exchangeable Acidity ◽  
Application Rates ◽  
Randomized Design ◽  
Lime Application ◽  
Phosphorus Application

The interactive effects of lime and phosphorus on maize growth in an acid soil were investigated in a greenhouse experiment. A completely randomized design with 12 treatments consisting of four lime levels, 0, 2, 10, and 20 t ha−1, in a factorial combination with three phosphorus rates, 0, 30, and 100 kg ha−1, was used. Maize was grown in pots for six weeks and its heights and dry matter yield were determined and soils were analyzed for available P and exchangeable acidity. Liming significantly reduced the exchangeable acidity in the soils. The effect of lime on available P was not significant but available P increased with increasing P rates. There was a significant effect of lime, P, and P by lime interactions on plant heights and dry matter. Without lime application, dry matter increased with increasing P rates but, with lime, dry mattes increased from 0 to 30 kg P ha−1but declined from 30 to 100 kg P ha−1. The highest dry matter yield (13.8 g pot−1) was obtained with a combined 2 t ha−1of lime with 30 kg P ha−1suggesting that lime application at low rates combined with moderate amounts of P would be appropriate in this soil.

scholarly journals CHARACTERIZATION AND EVALUATION OF APPEARANCE RICE (Oryza sativa L.) LOCAL EAST TIMOR AND RICE INDONESIA

2018 ◽  
Vol 6 (2) ◽  
pp. 120-129
Author(s):  
Abilio Tilman Baptista ◽  
Damanhuri ◽  
Nunun Barunawati
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Block Design ◽  
East Timor ◽  
Consumption Pattern ◽  
Flowering Date ◽  
Rate Of Increase ◽  
Timor Leste ◽  
Rice Genotypes ◽  
Time Of Harvest

Rice is an important commodity for the majority of the population, especially in the continent of Asia use rice as a staple food. The state of Indonesia and East Timor, rice as the main food source that needs continue to increase because in addition to the population continues to grow at a rate of increase of about 2% per year, as well as the change in consumption pattern of the population of non-rice to the rice. Interest characterization and evaluation of the appearance of rice(Oryza Sativa L.) locally Timor Leste and Indonesian rice are getting Local rice genotypes Timorese suitable for cultivated in paddy fields. This research using a randomized block design (RBD) consisted of 9 treatments and 3 replications. The materials used are high-yielding rice varieties namely IR-3 64, Ciherang, Cimelati and 6 local rice genotypes Timor Leste, namely Hare Foam, Fafulu Hare, Hare Bauk Morin, Mean Hare, Hare and Hare Modok Fulan. Results showed that the highest plant length at the age of 10 MST contained in the local rice Hare Bauk Morin(134.67 cm), Number of tillers(40.30) the number of leaves(4.64).Flowering date and time of harvest shortest genotypes present in Morin namely Hare Bauk flowering date (39 days) and time of harvest (105 days). The highest number of panicles contained in Hare Mean genotype, high-yielding varieties IR64, Ciherang and Cimelati. The length of the longest panicle genotypes present in Foam Hare, Hare Hare Fafulu, and Fulan. The number of filled grains per panicle most contained in superior varieties IR64, Ciherang and Cimelati. The highest weight of 1000 grains contained in Cimelati varieties (vu3) with Hare Bauk Morin, IR64 and Cherang varieties. The highest rice yield for local rice genotypes present in Hare Bauk Morin (G3) of 9.79 ton.Ha-1 while yielding varieties there exist varieties Cherang (vu2) of 9.74 ton.Ha-1.

scholarly journals Uji efektivitas kombinasi pupuk bio-slurry dengan pupuk npk terhadap pertumbuhan dan produksi dua varietas padi sawah (oryza sativa L.)

2018 ◽  
Vol 2 (2) ◽  
pp. 188
Author(s):  
Ahmad Khanafi ◽  
Yafizham Yafizham ◽  
Didik Wisnu Widjajanto
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Growth And Yield ◽  
Production Data ◽  
Single Treatment ◽  
Randomized Design ◽  
Npk Fertilizer ◽  
Completely Randomized Design ◽  
Fertilizer Combination ◽  
Range Test

The objective of this research was to investigate the effectiveness of combination of bio-slurry fertilizer and NPK fertilizer on the growth and production of two varieties of rice. The experiment was assigned in a completely randomized design of factorial pattern. The first factor was the combination of bio-slurry and NPK fertilizer that consisted of P0 = no added fertilizer (control) 0 ton/ha, P1 = NPK fertilizer 550 kg/ha (165 kg N, 33 kg P, 45 kg K); P2 = bio-slurryfertilizer 2.3 tons/ha (45 kg N, 14 kg P, 23 kg K) and NPK fertilizer 400 kg/ha (120 kg N, 24 kg P, 32 kg K); P3 = bio-slurryfertilizer 4.6 tons/ha (90 kg N, 28 kg P, 46 kg K) and NPK fertilizer 250 kg/ha (75 kg N, 15 kg P, 20 kg K); P4 = bio-slurry fertilizer 5.9 tons/ha (115 kg N, 36 kg P, 59 kg K) and NPK fertilizer 100 kg/ha (30 kg N, 6 kg P, 8 kg K); and P5 = bio-slurryfertilizer 8.5 tons/ha (165 kg N, 52 kg P, 85 kg K). The second factor was varieties of rice that consisted of V1 : IR-64 and V2 : Ciherang. Each treatment was repeated three times. Parameters observed were plant height, number of tillers, weight of 1.000 grains, and rice production. Data were analyzed using ANOVA and continued with Duncan’s Multiple Range Test (DMRT). The results showed that the combination of bio-slurry fertilizer and NPK fertilizer were significantlyaffect (p <0.05)all observation parameters, while varieties of wetland rice did not show significant effect on all observation parameters (p<0.05). The application of bio-slurry fertilizer in single treatment or in either combination with NPK fertilizer had the same result with the treatment of NPK fertilizer on the growth and yield of rice. Keywords: rice, fertilizer combination, bio-slurry fertilizer, NPK fertilizer

scholarly journals Evaluation of Drought Tolerance Indices in Rice Genotypes (Oryza Sativa L.)

2018 ◽  
Vol 10 (25) ◽  
pp. 7-18
Author(s):  
Sanam Safaei Chaeikar ◽  
Babak Rabiei ◽  
Mehdi Rahimi ◽  
◽  
◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Tolerance ◽  
Oryza Sativa L ◽  
Rice Genotypes ◽  
Drought Tolerance Indices ◽  
Tolerance Indices
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