scholarly journals Practical studies on the injuries of cool weather in rice plant. : 1 Effect of temperature after heading on weight of rice grains.

1949 ◽  
Vol 18 (2-4) ◽  
pp. 156-158
Author(s):  
M. Tanaka
Keyword(s):  
Rice Plant ◽  
Effect Of Temperature ◽  
Rice Grains

The effect of temperature and relative humidity on population growth of three Liposcelis species (Psocoptera: Liposcelidae) infesting stored products in tropical countries

1990 ◽  
Vol 80 (3) ◽  
pp. 353-358 ◽  
Author(s):  
D.P. Rees ◽  
A.J. Walker
Keyword(s):  
Relative Humidity ◽  
Population Growth ◽  
Geographical Distribution ◽  
Cereal Grains ◽  
Effect Of Temperature ◽  
Stored Products ◽  
Mould Growth ◽  
Pest Status ◽  
Rice Grains ◽  
The Tropics

AbstractThe effect of a range of temperatures (15–42°C) and relative humidities (40–80%) on growth of populations of Liposcelis entomophilus (Enderlein), Liposcelis bostrychophilus Badonnel and Liposcelis paetus Pearman infesting a rice-based medium was investigated. These species are often found infesting stored cereal grains in the tropics. Both L. entomophilus and L. bostrychophilus bred most rapidly at 30°C, 70–80% r.h. Neither survived at temperatures of 36°C and above. In contrast, L. paetus bred most rapidly at 33–36°C, 70% r.h., and was able to breed at 42°C, 80% r.h. No species survived humidities below 60%. As well as consuming mould growth, Liposcelis spp. also caused visible damage in rice grains. Implications of these findings in the understanding of pest status and geographical distribution of severe outbreaks of Liposcelis spp. are discussed.

scholarly journals On the Effect of Temperature upon the Division and Elongation of Cells in the Root of Rice Plant

1957 ◽  
Vol 26 (2) ◽  
pp. 94-95 ◽  
Author(s):  
Yutaka YAMAKAWA ◽  
Hidetoshi KISHIKAWA
Keyword(s):  
Rice Plant ◽  
Effect Of Temperature

scholarly journals Preferensi petani terhadap keragaan padi (Oryza sativa) unggul untuk lahan sawah di wilayah Pangandaran dan Cilacap

Kultivasi ◽  
2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Muhamad Khais Prayoga ◽  
Neni Rostini ◽  
Mieke Rochimi Setiawati ◽  
Tualar Simarmata ◽  
Silke Stoeber ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Rice Plant ◽  
Descriptive Analysis ◽  
Average Height ◽  
Measuring Instrument ◽  
Rice Plants ◽  
Rice Grains ◽  
Quantitative Design ◽  
Important Character ◽  
Salinity Resistance

Abstract The object that conducted in this study is farmer's preferences of rice plant charac-teristics. This study was taken in 3 villages which are village Ciganjeng, village Pamotan, and village Rawaapu. The method used in this study was quantitative design with descriptive analysis. The respondents were 64 rice plant farmers. Measuring instrument used was questionnaire and interview. The result of this study showed that farmers has its own preference for the character of rice plants. Conclution of this study is farmers preferred rice plants which has an average height of plants, wide leaves, leave's surface, leave's angle, and rice straw's type; rice straw that has many branches; strong braches; has a lot rice grains; maturity of rice plants; lenght and wide grains size; non-aromatic; and tender texture. The farmers thought that leave's surface isn't an important character of a rice plants;  high of plants, leave's lenght and wide, leave's angle, rice straw's type, grain's lenght and wide, and rice's scent are quite important characteristics; branch's strenght, grain's quantity, and plant's maturity are an important characteristics; resistance to pests, disease resistance, drought resistance, resistance to inundation, salinity resistance, productivity, and rice texture are the most important characteristics. Keywords : preferences, farmer, superior varietiesObjek yang dikaji dalam penilitian ini adalah preferensi petani terhadap karakter tanaman padi. Tempat penelitian dilaksanakan di 3 desa (Desa Ciganjeng, Desa Pamotan dan Desa Rawaapu). Desain penelitian menggunakan desain kuantitatif dengan pendekatan analisis data secara deskriptif. Metode yang diperunakan adalah survey untuk mengumpulkan data dengan mengedarkan kuisioner dan melakukan wawancara. Jumlah petani yang diwawancarai yaitu 64 orang. Hasil dari penelitian ini adalah petani lebih menyukai tanaman padi yang memiliki tinggi tanaman, panjang daun, lebar daun, permukaan daun, sudut daun dan tioe malai yang sedang, cabang malai sekunder yang banyak, ketegaran batang yang kuat, jumlah anakan yang banyak, umur yang genjah, ukuran gabah yang panjang dan lebar, aroma yang tidak wangi, serta tekstur nasi yang pulen. Petani beranggapan bahwa karakter permukaan daun merupakan karakter yang tidak penting; karakter tinggi tanaman, panjang daun, lebar daun, sudut daun, tipe malai, panjnag gabah, lebar gabah, dan aroma tergolong karakter cukup penting; karakter ketegaran batang, jumlah anakan, dan umur tanaman merupakan karekter yang penting; karakter ketahanan terhadap hama, ketahanan terhadap penyakit, ketahanan terhadap kekeringan, ketahanan terhadap genangan, ketahanan terhadap salinitas, produktivitas, dan karakter tekstur nasi merupakan karakter yang sangat penting.Kata kunci : preferensi, petani, varietas unggul

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