Dry Matter and Nitrogen Distribution at Maturity of Three Rice (Oryza sativa L.) Cultivars Exposed to Ammonia at Two Growth Stages

2005 ◽  
Vol 191 (2) ◽  
pp. 125-129 ◽  
Author(s):  
M. Ashraf ◽  
F. Hussain
Keyword(s):  
Oryza Sativa ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Growth Stages ◽  
Nitrogen Distribution

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 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.    

Study the Effect of Nitrogen Fertilizer Management on Dry Matter Remobilization of Three Cultivars of Rice (Oryza sativa L.)

2007 ◽  
Vol 10 (19) ◽  
pp. 3425-3429 ◽  
Author(s):  
Hossein Kazemi Pos ◽  
Hemmatollah Pirdashti ◽  
Mortaza Nasiri ◽  
Mohammad Ali Bahman
Keyword(s):  
Oryza Sativa ◽  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Fertilizer Management

Cadmium accumulation and bioavailability in paddy soil under different water regimes for different growth stages of rice (Oryza sativa L.)

2019 ◽  
Vol 440 (1-2) ◽  
pp. 327-339 ◽  
Author(s):  
Tao Tian ◽  
Hang Zhou ◽  
Jiaofeng Gu ◽  
Runyu Jia ◽  
Hongcheng Li ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Paddy Soil ◽  
Oryza Sativa L ◽  
Cadmium Accumulation ◽  
Growth Stages ◽  
Water Regimes ◽  
Different Growth Stages

Effect of stubble management with biological inoculants on the growth and yield of rice (Oryza sativa L.) in rice-based cropping systems

2004 ◽  
Vol 52 (1) ◽  
pp. 105-108 ◽  
Author(s):  
V. Damodaran ◽  
P. Subbian ◽  
S. Marimuthu
Keyword(s):  
Oryza Sativa ◽  
Tamil Nadu ◽  
Dry Matter ◽  
Management Practices ◽  
Oryza Sativa L ◽  
Management Practice ◽  
Cropping Systems ◽  
Trichoderma Viride ◽  
Growth And Yield ◽  
Biological Inoculants

A field experiment was conducted at Tamil Nadu Agricultural University from July 2001 to July 2002 to study the effect of different stubble management practices using biological inoculants on the growth and yield of rice in rice-based cropping systems. inoculation with Trichoderma viride during stubble incorporation followed by the application of 120 kg N ha-1 in 4 splits produced significantly taller plants, higher LAI and dry matter, a larger number of productive tillers, longer panicles with more filled grains and higher grain yield. However, it was on par with the stubble management practice involving Trichoderma viride followed by the application of 90 kg N ha-1 in 4 splits.

scholarly journals Preliminary Survey of Major Insect Pests of Rice (Oryza sativa L.) from Panvel, Navi Mumbai, India

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Pawar Prabhakar R ◽  
Mhatre Ramesh P ◽  
Supnekar Santosh P
Keyword(s):  
Oryza Sativa ◽  
Preventive Measures ◽  
Insect Pests ◽  
Oryza Sativa L ◽  
Baseline Data ◽  
Growth Stages ◽  
Preliminary Survey ◽  
Kharif Season ◽  
Number Of Species

A preliminary survey of major insect pests on rice was carried out during the Kharif season of 2020, from June 2020 to October 2020 in selected plots of rice around Panvel, Navi Mumbai, India. 16 species of insect pests representing 03 orders, 06 families and 15 genera were observed. Number of species of insect pests distributed in each family reveals that 09 species belongs to family Acrididae, 03 species to Erebidae and 1 species each to Crambidae, Nymphalidae, Libellulidae and Pyrgomorphidae. Family Acrididae shows the highest percent representation of species (56.25%) followed by Erebidae (18.75%) and Crambidae, Nymphalidae, Libellulidae and Pyrgomorphidae (6.25%). Results of the preset study indicates that larval forms and adults of grasshoppers, dragon flies and bugs are the major insect pests of paddy at various growth stages. It is recommended that preventive measures like frequent dusting and spraying of insecticides and de-weeding of the crop will control the infestation by insect pests and will improve the yield of rice. Since no earlier reports are available, data presented here can be taken as a baseline data on major insect pests of rice in Panvel region, Navi Mumbai, India

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.

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