scholarly journals Planting Density and Fertilization Evidently Influence the Fiber Yield of Hemp (Cannabis sativa L.)

Agronomy ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 368 ◽  
Author(s):  
Gang Deng ◽  
Guanghui Du ◽  
Yang Yang ◽  
Yaning Bao ◽  
Feihu Liu
Keyword(s):  
Cannabis Sativa ◽  
Application Rate ◽  
Planting Density ◽  
High Yield ◽  
Nitrogen Application ◽  
Potassium Fertilizer ◽  
Hemp Fiber ◽  
Fiber Yield ◽  
Potassium Application ◽  
Phosphorus Application

Hemp is one of the most important green (i.e., environmentally sustainable) fibers. Planting density, nitrogen (N), phosphorus (P) and potassium (K) significantly affect the yield of hemp fiber. By optimizing the above main four cultivation factors is an important way to achieve sustainable development of high-fiber yield hemp crops. In this study, the effects of individual factors and factor × factor interactions on the yield of hemp fiber over two trial years were investigated by the central composite design with four factors, namely planting density, nitrogen application, phosphorus application, and potassium application rate. The influences of these four test factors on the yield of hemp fibers were in the order nitrogen fertilizer (X2) > planting density (X1) > potassium fertilizer (X4) > phosphate fertilizer (X3). To obtain yields of hemp with high-quality fiber greater than 2200 kg ha−1, the optimal range of cultivation conditions were planting density 329,950–371,500 plants/ha, nitrogen application rate 251–273 kg ha−1, phosphorus application rate 85–95 kg ha−1, and potassium application rate 212–238 kg ha−1. This study can provide important technical and theoretical support for the high-yield cultivation of hemp fiber into the future.

The effect of density and nitrogen fertilizer on the growth and yield of maize (Zea maysL.) in Nigeria

1986 ◽  
Vol 107 (3) ◽  
pp. 573-578 ◽  
Author(s):  
E. O. Lucas
Keyword(s):  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Morphological Characters ◽  
Application Rate ◽  
Growth And Yield ◽  
High Yield ◽  
Nitrogen Application ◽  
Wide Range ◽  
Number Of Leaves ◽  
Applied Nitrogen

SummarFARZ 27, a high-yield maize variety, was grown in 1984 and 1985 over a wide range of density treatments (1·9– 11·1 plants/m2) and with four rates of nitrogen application (0, 75, 100 and 150 kg N/ha) in Ibadan. south-western Nigeria.There was no significant density or fertilizer effect on morphological characters of number of leaves per plant, height or stem diameter. For total dry-matter yield, the highest density of planting gave the highest yield although less dry matter was obtained in the 1985 experiment than in the 1984 experiment. Optimum density for grain production in both years was 8·8 plants/m2. There is an indication that there is no need to increase density of planting of maize beyond 80000 plants/ha in the south-western part of Nigeria. Plants without applied nitrogen fertilizer gave significantly lower total dry-matter and grain yields than plants with applied nitrogen. Highest grain yield was obtained with 150 kg N/ha in both years. By doubling the nitrogen application rate from the present recommended level of 75 kg N/ha to 150 kg N/ha an average increase of 0·42t/ha of maize was obtained in both years. With the present prices of fertilizer and maize, this increase is economical. It seems therefore that more revenue would accrue to the farmers by using 150 kg N/ha on the ‘FARZ series’ of maize instead of the present recommendation of 75 kg N/ha.

Effects of Potassium Application Rate on Stem Lodging Resistance of Summer Maize under High Yield Conditions

2013 ◽  
Vol 38 (11) ◽  
pp. 2093-2099 ◽  
Author(s):  
Bo LI ◽  
Ji-Wang ZHANG ◽  
Hai-Yan CUI ◽  
Li-Bin JIN ◽  
Shu-Ting DONG ◽  
...  
Keyword(s):  
Application Rate ◽  
High Yield ◽  
Summer Maize ◽  
Lodging Resistance ◽  
Potassium Application ◽  
Yield Conditions

scholarly journals 290 Potassium Fertilizer and Soil Nutrient Status Affect Internal White Tissue Severity and Influence Fruit Quality in Ohio Processing Tomatoes

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 441D-441
Author(s):  
William B. Evans ◽  
Mark A. Bennett
Keyword(s):  
Management Strategies ◽  
Soil Nutrient ◽  
Titratable Acidity ◽  
Nutrient Status ◽  
Application Rate ◽  
Nutrient Concentrations ◽  
Potassium Fertilizer ◽  
Tomato Crop ◽  
White Tissue ◽  
Potassium Application

A significant portion of the Great Lakes region's processing tomato crop is used to make whole fruit and diced products, where fruit color and textural uniformity are important. Soil and fertilizer studies were undertaken to better understand the role of soil fertility and potassium application on the color disorder known as internal white tissue (IWT) under this region's conditions and in area soils. During 2 years of replicated potassium rate trials in Ohio, tomato yield was not significantly altered by broadcast potassium applications. Potassium application rate was inversely correlated with frequency and severity of IWT in each season, and positively correlated with titratable acidity. The ability of split applications to influence IWT severity was not significantly different than that of preplant applications. IWT symptom frequency and severity was correlated with elemental concentrations in the fruit, leaves, and soil. In 1998, severity of IWT symptoms was positively correlated with shoulder tissue calcium and sodium concentrations, and negatively correlated with concentrations of phosphorus, magnesium, and nitrogen. Correlations for other nutrients, including potassium, were less clear. A companion study of six grower fields during the second year, using grid sampling techniques and the IWT-susceptible Peto 696 cultivar, found significant variability of IWT symptoms within and among fields. Variability within fields was correlated with soil nutrient concentrations. These data indicate researchers may be able to develop recommendations for field mapping and precision management strategies that can reduce the levels of IWT for area growers.

Cotton physiological and agronomic response to nitrogen application rate

2021 ◽  
Vol 270 ◽  
pp. 108194
Author(s):  
John Snider ◽  
Glendon Harris ◽  
Phillip Roberts ◽  
Calvin Meeks ◽  
Daryl Chastain ◽  
...  
Keyword(s):  
Application Rate ◽  
Nitrogen Application ◽  
Nitrogen Application Rate
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