scholarly journals Avaliação da interação de níveis de fertilizantes e misturas de herbicidas na cultura do arroz (Oryza sativa L.) / Evaluation of the interaction of levels of fertilizers and herbicide mixtures in rice cultivation (Oryza sativa L.)

2021 ◽  
Vol 4 (4) ◽  
pp. 6629-6647
Author(s):  
Víctor Goyes Cabezas ◽  
Miguel Goyes Cabezas ◽  
Gustavo Vàsconez Galarza ◽  
Carlos Castro Arteaga ◽  
Adolfo Ramírez Castro ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Rice Cultivation ◽  
Herbicide Mixtures

A presente investigação foi realizada com o objetivo de determinar a interação entre os diferentes níveis de fertilização e misturas de herbicidas no cultivo de arroz (Oryza sativa) na área de Babahoyo. Foi utilizada a variedade de arroz INIAP 15. Foi aplicado o delineamento de Parcelas Divididas, cujos tratamentos consistiram em níveis de fertilização, subtratamentos por mistura de herbicidas e três repetições. Para a comparação das médias, foi utilizado o teste de Tukey com significância de 5%. Para estimar os efeitos dos tratamentos e subtratamentos, os dados do índice de toxicidade foram avaliados aos 7 e 14 dias após a aplicação dos herbicidas, controle de plantas daninhas aos 15 e 30 dias após a aplicação dos herbicidas, altura da planta na colheita, número de perfilhos / m2, número de panículas, dias para o florescimento, maturidade fisiológica, comprimento da panícula, grãos por espiga, peso de 1000 grãos, rendimento de grãos e análise econômica. Os resultados mostram que a interação dos níveis de fertilizantes e misturas de herbicidas obteve efeitos positivos na produção da cultura do arroz (Oryza sativa L.), na área de Babahoyo; Aos 7 dias, a toxicidade na cultura era sem danos e aos 14 dias poucos danos foram mostrados; o melhor controle de plantas daninhas foi apresentado com as misturas de Piribenzoxim + 2,4 D amina (1,0 L + 0,7 L) aos 15 e 30 dias após a aplicação dos produtos; Características agronômicas como altura da planta, perfilhos e panículas / m2, comprimento das panículas e grãos por espiga foram influenciadas em suas médias com a aplicação de Nitrogênio (160 kg / ha) + Fósforo P2O5 (40 kg / ha) + Potássio K2O (60 kg / ha); Nos dias para a floração e maturidade fisiológica, todos os tratamentos e subtratamentos responderam da mesma forma porque foi utilizada a variedade Iniap 15; o maior peso de 1000 grãos e produtividade foi apresentado na aplicação de Nitrogênio (160 kg / ha) + Fósforo P2O5 (40 kg / ha) + Potássio K2O (60 kg / ha) e nas misturas de herbicidas aplicadas nos três subtratamentos e. o maior benefício líquido foi alcançado aplicando como fertilizantes Nitrogênio (160 kg / ha) + Fósforo P2O5 (40 kg / ha) + Potássio K2O (60 kg / ha) complementar às misturas herbicidas baseadas em Clomazone + Pyrazosulfuron Etil (1,0 L + 0,35 kg) com $ 662,02 / ha.

scholarly journals Rice (Oryza sativa L) cultivation in the highest elevation of the world

2013 ◽  
Vol 2 ◽  
pp. 31-41 ◽  
Author(s):  
MN Paudel
Keyword(s):  
Oryza Sativa ◽  
Agricultural Research ◽  
Oryza Sativa L ◽  
Future Generation ◽  
Rice Cultivation ◽  
Temperate Region ◽  
Japonica Variety ◽  
Rice Varieties ◽  
The World ◽  
The Impact

Jumla is one of the 75 districts in the midwestern hills of Nepal. Rice (Oryza sativa L) cultivation in Jumla ranges from 2,400 to 3,050 m altitude, which is the highest elevation in the world. The highest elevation at 3,050 m is Chhumjul of Jumla, a record altitude, where rice is cultivated in Nepal. Jumli Marshi, a Japonica variety of indigenous rice, having cold tolerant gene, is probably cultivated since 1,300 years ago in Jumla in the bank of the Tila river. Improved rice varieties were tested in the Jumla valley by the Nepal Agricultural Research Council (NARC). In 2002, two improved rice varieties Chandannath-1 and Chandannath-3 were released for temperate region of Jumla and Karnali zone. Productivity of rice in Jumla is 1.7 mt/ha almost 40% lower than that of national average of 2.97 t/ha. Low productivity of rice is mainly due to the constraints of many biotic, abiotic and socio-economic factors. Food security in the food deficit region of the Karnali zone could be sustained by increasing rice productivity in the Jumla region where perennial irrigation is available round the year. Whole of the Jumla region is unique place with respect to rice cultivation in the highest altitude of the world. The practice of rice cultivation in Jumla could be a remarkable activity for boosting agro-tourism in the agrarian country like Nepal. Rice cultivation in Jumla is quite unique from the rice cultivation even in the same range of temperate region. Such a typical organic rice production system in the highest elevation of the world needs immediate attention of all institutions and authorities concerned to conserve it for the future generation as well. Jumla, the temperate region, is also affected by the impact of global warming thereby receding water level in the Tila river and its tributaries flowing in the Jumla valleys during rice growing season (March - October). Attempts have been made to document ethno-culture, socio-economic and cultural practices of rice cultivation in the highest elevation in the world. DOI: http://dx.doi.org/10.3126/ajn.v2i0.7519 Agronomy Journal of Nepal (Agron JN) Vol. 2: 2011 pp.31-41

scholarly journals Effect of dates and methods of winter rice (Oryza sativa L.) transplanting on relayed niger (Guizotia abyssinica) and soil health

2019 ◽  
Author(s):  
Anju Mala Deka ◽  
P. C. Bora ◽  
H. Kalita ◽  
A. S.N. Zaman ◽  
Pompi Saikia
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Conventional Method ◽  
Oryza Sativa L ◽  
Rice Cultivation ◽  
System Of Rice Intensification ◽  
Guizotia Abyssinica ◽  
Relay System ◽  
Yield Attributes ◽  
Available N

A field experiment was conducted to study the effect of dates of transplanting under different methods of cultivation on productivity of winter rice (Oryza sativa L.) and their effect on rice-niger (Guizotia abyssinica) relay system at Regional Agricultural Research Station, Shillongani Nagaon, Assam during kharif-rabi seasons in the year 2014-15 and 2015-16. Rice transplanted on 20 June recorded significantly higher yield attributes and grain yield of rice (59.19 q/ha) as compared to the later dates of transplanting, and it was followed by 5 July- transplanted rice. Transplanting on 20 June resulted in higher values in respect of yield attributes, yield of relayed niger, rice equivalent yield (REY) of rice- niger relay system (75.68 q/ha), NPK uptake by rice and niger as well as soil fungal and bacterial population after harvest of rice and niger. System of Rice Intensification (SRI) recorded significantly higher value of yield attributes and grain yield of rice (60.34q/ha) as compared to conventional method. In case of relayed niger, yield attributes, seed yield and REY were found higher under SRI method of rice cultivation. Under SRI method, higher uptake of NPK by rice and niger and higher soil fungal and bacterial populations after harvest of rice and niger were observed as compared to conventional method. However, conventional method of rice cultivation recorded significantly higher values of soil available N, P2O5 and K2O content at the end of two year-crop cycle over that of SRI.

scholarly journals Studies on Phytotoxicity of Herbicides and Herbicide Mixtures and its effect on Yield of Direct-Sown Rice (Oryza sativa L.)

2017 ◽  
Vol 8 (6) ◽  
pp. 853-856
Author(s):  
Ashirbachan Mahapatra ◽  
◽  
Sanjoy Saha ◽  
Sushmita Munda ◽  
R. K. Shukla ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Herbicide Mixtures ◽  
Effect On Yield
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