scholarly journals Influence of nitrogen content upon the various characters of two, types of rice varieties cultured in nutrient solution.

1958 ◽  
Vol 8 (3) ◽  
pp. 155-162
Author(s):  
Tatuzo HOSHINO ◽  
Shiro SAMOTO ◽  
Kunio OUTI
Keyword(s):  
Nitrogen Content ◽  
Nutrient Solution ◽  
Rice Varieties

scholarly journals Evaluation of the Non-destructive Method Efficiency of Estimating Nitrogen Content in Jambu Plants Grown in Hydroponic System

2020 ◽  
Vol 8 (2) ◽  
pp. 466
Author(s):  
Italo Marlone Gomes Sampaio ◽  
Mário Lopes da Silva Júnior ◽  
Erika Da Silva Chagas ◽  
Ricardo Falesi Palha de Moraes Bittencourt ◽  
Vivian Christine Nascimento Costa ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Nutrient Solution ◽  
Linear Models ◽  
Nitrogen Concentration ◽  
Chlorophyll Concentration ◽  
Technical Information ◽  
Dry Mass ◽  
Leafy Vegetables ◽  
Total Chlorophyll ◽  
N Content

Jambu is considered a leafy vegetable with expressive relevance in the regions that compose the Brazilian Amazon. However, there are challenges regarding its cultivation, particularly for the nutritional management, since there is little technical information that allows an increase in the efficiency of its production. In this sense, nitrogen (N) gains prominence, since it is related to the increased yield and quality of leafy vegetables, therefore its monitoring of N content in plants is necessary. The objective of this study was to evaluate the efficiency of using the SPAD index to estimate the N content of jambu leaves, total chlorophyll concentration, as well as its relationship with dry mass accumulation due to the increase of nitrogen concentration in the nutrient solution. The design used was completely randomized with eight replications. The treatments were six nitrogen concentrations in the nutrient solution (11, 13, 15, 17, 19 and 21 mmol L-¹). After 21 days of transplantation, the SPAD index was measured. Then, these plants were collected to quantify the total chlorophyll, dry mass and nitrogen content. In general, the variables were explained by increasing linear models. There was a positive correlation between the SPAD index and the other characteristics evaluated. Based on the results, the best response at the concentration of 21 mmol L-¹ in the nutrient solution stands out. In addition, the SPAD index has potential to be used in the diagnosis of nitrogen status in jambu leaves.

scholarly journals Determination of the Optimal Nitrogen Content in a Fertigation Medium for the Greenhouse Cucumber Grown on Slabs of Compressed Straw

2009 ◽  
Vol 71 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Józef Babik ◽  
Waldemar Kowalczyk
Keyword(s):  
Nitrogen Content ◽  
Nutrient Solution ◽  
Nitrogen Fertilization ◽  
Research Work ◽  
Growing Season ◽  
Cultivation Period ◽  
Greenhouse Cucumber ◽  
Cucumber Yield

Determination of the Optimal Nitrogen Content in a Fertigation Medium for the Greenhouse Cucumber Grown on Slabs of Compressed StrawIn the years 2004-2008, research work was carried out whose aim was to determine the optimal nitrogen fertilization dose for greenhouse cucumbers grown on mats made of compressed, finely shredded straw. In the experiments, the short-fruited variety of the greenhouse cucumber, Milenium F1, was used. The level of nitrogen in the nutrient solution was varied in the range of 200-350 mg·dm-3. The nitrogen content in the solution in the amount of 200 mg·dm-3was not sufficient and caused the cucumber yield to fall. The increasing N concentrations in the medium were found to have a significant effect on the nitrogen content in the indicator parts of cucumber plants. The highest nitrogen content was found in the plants fertilized with a nutrient solution containing the highest concentration of N-NO3, which was 350 mg·dm-3. Cucumber plants grown on straw need to be more intensely fertilized with nitrogen for about 1/3 of the growing season, and then to have its level in the fertigation medium reduced for the remaining part of the cultivation period.

scholarly journals Tolerance of 20 heirloom rice varieties at seedling stage salinity stressed and their growth in lowland coastal area

Akta Agrosia ◽  
2020 ◽  
Vol 23 (2) ◽  
pp. 47-54
Author(s):  
Rustikawati Rustikawati ◽  
Catur Herison ◽  
Muhammad Chozin ◽  
Indres Indres
Keyword(s):  
Nutrient Solution ◽  
Salinity Tolerance ◽  
Soil Salinity ◽  
Coastal Area ◽  
Sea Water ◽  
Rice Production ◽  
Tolerance Index ◽  
Rice Varieties ◽  
Nutrient Culture ◽  
Tidal Swamp

Coastal area of Bengkulu Province is home of many heirloom rice varieties and play an important role in contributing rice production in the province. However, as the climate change proceeds, a progressive sea water inundation has increased soil salinity mainly in low-lying areas and jeopardizing the sustainability of rice production in coastal regions.  The use of salt-tolerant varieties, therefore, would be a sensible solution to alleviate the adverse effect of soil salinity in respect of maintaining the crop production in the coastal areas. The objective of this study was to examine the salinity tolerance of 20 heirloom rice varieties collected from a coastal area of Bengkulu Province.  Prior to the screening process, lethal concentration 90 (LC90) was determined by assaying the seedlings of ‘Kuning Tinggi’ in a series of nutrient solution containing a different concentration of NaCl (0, 2000, 4000, 6000, 8000 and 10000 ppm). Using a regression analysis, LC90 was detected at a concentration of 3910 ppm. The screening was performed by exposing the varieties in the nutrient solution culture containing 4000 ppm NaCl and growing them on the tidal swamp. Under nutrient culture evaluation, the symptom of NaCl toxicity was scored and converted to salinity tolerance index. ‘Humbur’, ‘Kuning Tinggi’ and ‘Padang Bakung’ exhibited medium tolerant, while ‘Beram’, ‘Imperata’ and ‘Kuning’ exhibited very sensitive. Further evaluation of the tidal swamp for vegetative and generative performances signified that ‘Humbur’ and ‘Kuning Tinggi’ had medium tolerant to salinity stress

scholarly journals Composted Poultry Litter as Potting Media does not Affect Transplant Nitrogen Content or Final Crop Yield

1997 ◽  
Vol 7 (2) ◽  
pp. 142-145 ◽  
Author(s):  
E.A. Guertal ◽  
B.K. Behe ◽  
J.M. Kemble
Keyword(s):  
Nitrogen Content ◽  
Brassica Oleracea ◽  
Crop Yield ◽  
Nutrient Solution ◽  
Poultry Litter ◽  
Dry Weight ◽  
Waste Materials ◽  
Plant Weight ◽  
Potting Media ◽  
Cole Crop

The use of composted waste materials as an alternative source of potting media has received much interest in recent years. Our objective was to incorporate composted, ground poultry litter into a standard greenhouse potting mix, and evaluate the effect of the poultry litter on vegetable transplants grown in the greenhouse and transplanted to the field. Treatments consisted of potting mixes of 100% potting media or 50/50 media/poultry litter. Collards (Brassica oleracea L. var. acephala DC.), broccoli (Brassica oleracea var. italica Plenck.), cabbage (Brassica oleracea L. var. capitata L.) and three tomato (Lycopersicon esculentum Mill.) cultivars were utilized as test crops. A nutrient solution treatment of 8 oz of 8N-11P-7K fertilizer or 8 oz of water was added when transplants were set in the field. Plant weight and nitrogen content were measured weekly during the greenhouse production stage, and final crop yield was recorded at harvest. Any effect from the inclusion of poultry litter in the potting media on cole crop (collards, broccoli, cabbage) transplant dry weight had disappeared by the fourth week of sampling in the greenhouse, and final yield of cole crops was unaffected by either type of potting mix or presence or absence of starter nutrient solution. Dry weight of tomato transplants was not affected by type of potting media. Differences in tomato yield due to type of potting mix were observed, as plots with transplants grown in the 50/50 mix had greater nonmarketable yields (`Bonnie' and `Big Boy'). Yield of `Big Boy' tomato was increased by the addition of starter nutrient solution. It appears that composted, uniformly prepared waste materials are suitable for production of vegetable transplants.

scholarly journals Detection and Dynamic Variation Characteristics of Rice Nitrogen Status after Anthesis Based on the RGB Color Index

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1739
Author(s):  
Kaocheng Zhao ◽  
Ying Ye ◽  
Jun Ma ◽  
Lifen Huang ◽  
Hengyang Zhuang
Keyword(s):  
Nitrogen Content ◽  
Hybrid Rice ◽  
Leaf Nitrogen ◽  
Leaf Nitrogen Content ◽  
Japonica Rice ◽  
Rice Varieties ◽  
Nitrogen Levels ◽  
Monitoring Model ◽  
Whole Plant ◽  
Rice Leaves

We aimed to elucidate the color changes of rice leaves after anthesis and create an algorithm for monitoring the nitrogen contents of rice leaves and of the whole plant. Hence, we aimed to provide a theoretical basis for the precise management of rice nitrogen fertilizer and the research and development of digital image nutrition monitoring equipment and reference. We selected the leaf colors of the main stems of four major rice varieties promoted in production, including Huaidao 5 (late-maturing medium japonica rice), Yangjing 4227 (early maturing late japonica rice), Changyou 5 (late japonica hybrid rice), and Yongyou 8 (late japonica hybrid rice). Under different nitrogen levels, the leaf R, G, and B values of the four rice varieties at different stages after anthesis, the dynamic changes in RGB normalized values, the correlations between RGB normalized values and leaf SPAD values, the leaf nitrogen content and whole plant nitrogen content, and the nitrogen prediction model were studied. The research results demonstrate the following: (1) regardless of nitrogen levels, the leaf of R, G, B, NRI, NGI and NBI of different rice varieties after anthesis followed the order, G > R > B. R, G, NRI, NGI, and days after heading could be fitted according to a logarithmic equation, y = aebx (0.726 ≤ R2 ≤ 0.992); B, NBI, and days after heading could be fitted using a linear equation, y = a + bx (0.863 ≤ R2 ≤ 0.992). Both fitting effects were significant (except NGI). (2) A quadratic function (Y = −1296.192x2 + 539.419x − 10.914; Y = −1173.104x2 + 527.073x − 12.993) was adopted to construct a monitoring model for the NBI and SPAD values of japonica rice and hybrid japonica rice leaves after anthesis and the R2 values were 0.902 and 0.838, respectively. Exponential functions (Y = 5.698e7.261x; Y = 3.371e9.326x) were employed to construct monitoring models of leaf nitrogen content, and the R2 values were 0.833 and 0.706, respectively. Exponential functions (Y = 5.145e4.9143x; Y = 3.966e5.364x) were also used to construct a monitoring model for the nitrogen content of the whole plant, and the R2 values were 0.737 and 0.511, respectively. The results obtained from prediction tests by using Determination Coefficient (R2), Relative Percent Deviation (RPD), and Root Mean Square Error (RMSE) showed that it was feasible, accurate, and efficient to use a scanner for measuring the nitrogen content of rice.

Poultry Manure as a Fertilizer

EDIS ◽  
2013 ◽  
Vol 2013 (11) ◽  
Author(s):  
Michael A. Davis ◽  
Doug R. Sloan ◽  
Gerald Kidder ◽  
R. D. Jacobs
Keyword(s):  
Organic Matter ◽  
Environmental Factors ◽  
Nitrogen Content ◽  
Soil Amendment ◽  
Poultry Manure ◽  
Nutrient Retention ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Animal Science ◽  
Fact Sheet

Animal manures have been used as natural crop fertilizers for centuries. Because of poultry manure’s high nitrogen content, it has long been recognized as one of the most desirable manures. Besides fertilizing crops, manures also supply other essential plant nutrients and serve as a soil amendment by adding organic matter, which helps improve the soil’s moisture and nutrient retention. Organic matter persistence will vary with temperature, drainage, rainfall, and other environmental factors. This 2-page fact sheet was written by Michael A. Davis, D.R. Sloan, Gerald Kidder, and R.D. Jacobs, and published by the UF Department of Animal Science, November 2013. http://edis.ifas.ufl.edu/aa205

STANDING CROP NITROGEN CONTENT (FIFE)

1994 ◽  
Author(s):  
T. G. F. KITTEL ◽  
W. J. PARTON ◽  
D. S. SCHIMEL
Keyword(s):  
Nitrogen Content ◽  
Standing Crop
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