scholarly journals Studies on the Development of the Ventilating System in Relation to the Tolerance against Excess-Moisture Injury in Various Crops. : VII. Comparative studies on the ventilating pressure in lowland and upland rice plants growing under flooded and under water economized conditions. : VIII. On the ventilating system and the ventilating psessure in various plants growing on lowland and on upland.

1956 ◽  
Vol 24 (4) ◽  
pp. 289-295 ◽  
Author(s):  
Hiroki ARIKADO
Keyword(s):  
Comparative Studies ◽  
Upland Rice ◽  
Rice Plants ◽  
Excess Moisture

scholarly journals Effects of silicon on aluminum toxicity in upland rice plants

2017 ◽  
Vol 420 (1-2) ◽  
pp. 263-275 ◽  
Author(s):  
Lucas Barbosa de Freitas ◽  
Dirceu Maximino Fernandes ◽  
Suelen Cristina Mendonça Maia ◽  
Adalton Mazetti Fernandes
Keyword(s):  
Aluminum Toxicity ◽  
Upland Rice ◽  
Rice Plants

scholarly journals Straw and early nitrogen fertilization affect soil properties and upland rice yield

2016 ◽  
Vol 46 (3) ◽  
pp. 284-291 ◽  
Author(s):  
Adriano Stephan Nascente ◽  
Anna Cristina Lanna
Keyword(s):  
Microbial Biomass ◽  
Nitrate Reductase ◽  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Upland Rice ◽  
Microbial Biomass Carbon ◽  
Biomass Carbon ◽  
Early Application ◽  
Total N ◽  
Rice Plants

ABSTRACT The presence of cover crop straw and early application of total N at sowing may provide significant changes in the microbial population, reflecting on the N dynamics in the soil and in upland rice plants. This study aimed at determining the effect of the early application of nitrogen doses as mineral N and microbial biomass carbon in the soil, as well as in the activity of nitrate reductase, and grain yield of upland rice plants cultivated under no-tillage system (NTS). A randomized blocks design, in a split-plot scheme, with four replications, was used. The treatments consisted of N doses (0 kg ha-1, 40 kg ha-1, 80 kg ha-1 and 120 kg ha-1) and the presence or absence of U. brizantha cover straw. Maintaining the straw on the soil surface reduces the ammonium levels and increases the microbial biomass carbon content of the soil. The application of increasing doses of N in the soil provides increases in the levels of nitrate and ammonium in the soil up to 28 days after emergence. The activity of the nitrate reductase enzyme in the plants increases and the contents of ammonium and nitrate in the soil decrease with the crop development. The number of panicles and grain yield of upland rice increase with the increase of the nitrogen fertilization, but decrease in the presence of U. brizantha straw. Thus, it is recommend the use of early N fertilization in upland rice crop.

scholarly journals Sources and doses of aluminum in experiments with rice in nutrient solution

2019 ◽  
Vol 23 (7) ◽  
pp. 511-517
Author(s):  
Lucas B. de Freitas ◽  
Dirceu M. Fernandes ◽  
Suelen C. M. Maia ◽  
Arianne Moniz ◽  
Beatriz G. Mazziero ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Aluminum Chloride ◽  
Aluminum Toxicity ◽  
Upland Rice ◽  
Dry Weight ◽  
Potassium Sulfate ◽  
Rice Plants ◽  
Randomized Design ◽  
Aluminum Activity ◽  
Aluminum Compounds

ABSTRACT The aluminum source to produce toxicity in upland rice in nutrient solution experiments is not yet well established, althought the aluminum potassium sulfate has been utilized source to produce aluminum toxicity. However, in recent studies have used aluminum chloride. The aim of this study was to evaluate the capacity of aluminum sources and doses to produce toxicity in upland rice plants grown in nutrient solution. The experiment was arranged in a block randomized design, in a 2 x 5 factorial scheme and four repetitions. The treatments were two aluminum sources (aluminum potassium sulfate - AlK(SO4)2.12H2O and aluminum chloride - AlCl3.6H2O) and five aluminum doses in nutrient solution (0, 370, 740, 1100 and 1480 μmol L-1). The experiment was conducted in a greenhouse in Botucatu city, São Paulo state, Brazil, starting in April 2012, and was carried out for 56 days from transplanting of the seedlings. Using aluminum chloride, the rice plants show lower production of root and total dry weight, area and root volume, medium and thick root length, potassium and sulfur contents and accumulations. Using aluminum potassium sulfate, there are lower aluminum activity and availability, besides the formation of large amount of aluminum compounds non-toxic to the plants (aluminum sulfate) in the nutrient solution. The aluminum doses between 1100 to 1480 µmol L-1, corresponding to aluminum activity of 336.8 to 429.0 µmol L-1 of aluminum chloride as source, are more effective to produce aluminum toxicity in upland rice plants grown in nutrient solution.

scholarly journals PEMANFAATAN MODEL SIMULASI NERACA AIR LAHAN DAN PERTUMBUHAN UNTUK PENDUGAAN PRODUKTIFITAS PADI GOGO

2017 ◽  
Vol 6 (2) ◽  
Author(s):  
Tisen Tisen
Keyword(s):  
Simulation Model ◽  
Radiation Intensity ◽  
Upland Rice ◽  
Cost Savings ◽  
Sun Exposure ◽  
Simulation Models ◽  
Influential Factors ◽  
Tropical Regions ◽  
Rice Plants ◽  
Land Water

Agricultural simulation models have several advantages over agronomic research results in the field, especially in time and cost savings. The purpose of using the simulation model in this study is to apply simulation models in agricultural crops, especially in upland rice, by incorporating influential factors such as climate change. The simulation model applied in this study is a simulation model of land water balance and simulation of growth of upland rice plants in paddy fields located in Kupang, Bogor and Banjar Baru districts. The results showed that upland rice plants require full sun exposure without shade. In Indonesia has a long solar radiation of ± 12 hours a day with radiation intensity of 350 cal / cm / day in the rainy season. This radiation intensity is low if compared with sub-tropical regions that can reach 550 cal cm-2 days-1. Wind affects pollination and fertilization but if too tight it will knock down the plants Model simulasi pertanian mempunyai beberapa keunggulan dibandingkan hasil penelitian agronomi di lapangan khususnya dalam penghematan waktu dan biaya. Tujuan dari penggunaan model simulasi dalam kajian ini adalah mengaplikasikan model-model simulasi pada tanaman pertanian khususnya pada tanaman padi gogo, dengan memasukkan faktor-faktor yang berpengaruh dianataranya perubahan iklim. Model simulasi yang diaplikasikan dalam kajian ini adalah model simulasi neraca air lahan dan simulasi pertumbuhan tanaman padi gogo di lahan sawah yang terletak di kawasan Kabupaten Kupang, Bogor dan Banjar Baru. Hasil penelitian menunjukkan Tanaman padi gogo memerlukan penyinaran matahari penuh tanpa naungan. Di Indonesia memiliki panjang radiasi matahari ± 12 jam sehari dengan intensitas radiasi 350 cal/cm/hari pada musim penghujan. Intensitas radiasi ini tergolong rendah jika dibandinkan dengan daerah sub tropis yang dapat mencapai 550 cal cm-2 hari-1. Angin berpengaruh pada penyerbukan dan pembuahan tetapi jika terlalu kencang akan merobohkan tanaman

scholarly journals Initial development of upland rice plants inoculated with the MAY12 strain of Azospirillum spp.

2021 ◽  
Vol 51 (12) ◽  
Author(s):  
Marivaine da Silva Brasil ◽  
Mayara Silva Torres de Souza ◽  
Salomão Lima Guimarães ◽  
Sergio Luiz Koswoski Junior ◽  
Matheus Wimkler Alvarenga Batistela
Keyword(s):  
Upland Rice ◽  
Dry Mass ◽  
Nitrogen Fertilizers ◽  
Partial Reduction ◽  
Root Volume ◽  
Initial Development ◽  
Full Dose ◽  
Rice Plants ◽  
Commercial Inoculant ◽  
Absolute Control

ABSTRACT: The purpose of this study was to evaluate the contribution of the inoculation of the strain Azospirillum MAY12 to the development of rice plants of the cultivar BRS Esmeralda. A completely randomized experiment was performed in a greenhouse, with 8 treatments and 6 repetitions, namely, commercial inoculant (CI) containing strains of Azospirillum brasilense ABV5 and ABV6 (T1), MAY12 (T2), nitrogen control with 50 mg of N or full dose (T3), CI + 30% of N (percentage referring to full dose) (T4), CI + 60% N (T5), MAY12 + 30% N (T6), MAY12 + 60% N (T7) and absolute control (T8). There was a significant increase in the fresh and dry mass of the shoot and roots, height, root volume, and the number of tillers and leaves of plants with the MAY12 inoculation (with and without N added) compared to T8. Treatments containing MAY12 + N increased the total dry mass by ~920% compared to T8, matching the T3 yield. The inoculation of MAY12 in isolation was as efficient as the application of the full dose of N, resulting in an increase of ~115% in height and 373% in root volume of the plants compared to T8. The MAY12 strain demonstrated good performance in the development of the cultivar, which was comparable to the CI in the variables tested. Therefore, inoculation with the MAY12 strain is promising for the partial reduction of nitrogen fertilizers in upland rice cultivation.

scholarly journals On the Growth of Upland Rice Plants as Affected by the Depth of Surface Soil and Quantities of Fertilyzers

1934 ◽  
Vol 6 (4) ◽  
pp. 442-474
Author(s):  
Kiyomitsu TABATA ◽  
Toshimasa TEDSUKA ◽  
Yo HAMADA
Keyword(s):  
Surface Soil ◽  
Upland Rice ◽  
Rice Plants

scholarly journals On the Effects of Application of Sodium Chloride on the Growth of Upland Rice Plants

1930 ◽  
Vol 2 (3) ◽  
pp. 217-229
Author(s):  
KIYOMITSU TABATA ◽  
KIYOSHI YOSHIKAWA
Keyword(s):  
Sodium Chloride ◽  
Upland Rice ◽  
Rice Plants

scholarly journals On the Growth of Upland Rice Plants as Affected by the Depth of Surface Soil and Quantities of Fertilizers

1934 ◽  
Vol 6 (3) ◽  
pp. 335-350
Author(s):  
Kiyomitsu TABATA ◽  
Toshimasa TEDSUKA ◽  
Yo HAMADA
Keyword(s):  
Surface Soil ◽  
Upland Rice ◽  
Rice Plants
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