INFLUENCE OF MULCHING AND NITROGEN FERTILIZATION RATE ON GROWTH AND YIELD OF HIGHBUSH BLUEBERRY

2006 ◽  
pp. 231-236 ◽  
Author(s):  
B. Kozinski
Keyword(s):  
Nitrogen Fertilization ◽  
Fertilization Rate ◽  
Growth And Yield ◽  
Highbush Blueberry

scholarly journals Effect of Nitrogen Fertilization on Growth and Yield of Industrial Hemp (Cannabis sativa L.)

2018 ◽  
Vol 46 (1) ◽  
pp. 197-201 ◽  
Author(s):  
Panayiota PAPASTYLIANOU ◽  
Ioanna KAKABOUKI ◽  
Ilias TRAVLOS
Keyword(s):  
Plant Height ◽  
Nitrogen Fertilization ◽  
Seed Weight ◽  
Biomass Yield ◽  
Cannabis Sativa ◽  
Control Plant ◽  
Dry Weight ◽  
Fertilization Rate ◽  
Growth And Yield ◽  
Industrial Hemp

Fibre hemp is grown for a multitude of end products derived from its cannabinoids, seed, fibre and wooden core. A key factor that influences the quantity and quality of the production of hemp is nitrogen fertilization. The aim of this study was to determine the response of five well-adapted industrial hemp cultivars to different nitrogen fertilization rates during the 2016 growing season. The experiment was laid out in a split-plot design with two replicates, five main plots (hemp cultivars: ‘Bialobrzeskie’, ‘Tygra’, ‘Felina 32’, ‘Sanhtica 27’, ‘Futura 75’) and sub-plots [fertilization treatments: control (N0), fertilizer 46-0-0 at 120 kg ha-1 (N1), 180 kg ha-1 (N2), 240 kg ha-1 (N3)]. For the computation of height, biomass yield, stem dry weight, length and weight of the inflorescences and mean seed weight, 10 plants were randomly selected in each plot. In general, increasing N fertilization rate positively impacts hemp biomass yield, stem dry weight, plant height, and inflorescence indices. Biomass yield, stem dry weight and inflorescence weight increased by 37.3%, 48.2% and 16%, respectively, with the application of 240 kg N ha-1 when compared with the unfertilized control. Plant height and inflorescence length increased from 1.66 to 1.76 m and from 66.2 to 82.9 cm, respectively, with the application of the higher N rate compared with the control, while there were no significant differences between the fertilization treatments for mean seed weight. The varieties ‘Tygra’ and ‘Futura 75’ showed the highest values for all the measurement characters. Our results indicate that hemp responded well to the addition of N fertilizer.

scholarly journals Nitrogen Fertilization Effects on Physiology of the Cotton Boll–Leaf System

Agronomy ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 271
Author(s):  
Jing Chen ◽  
Liantao Liu ◽  
Zhanbiao Wang ◽  
Hongchun Sun ◽  
Yongjiang Zhang ◽  
...  
Keyword(s):  
River Basin ◽  
Nitrogen Fertilization ◽  
Yellow River ◽  
Yellow River Basin ◽  
Growth And Yield ◽  
The Yellow River ◽  
Nitrogen Rate ◽  
The Yellow River Basin ◽  
Source Sink ◽  
Subtending Leaves

The objective of this study was to assess the impacts of nitrogen on the physiological characteristics of the source–sink system of upper fruiting branches under various amounts of nitrogen fertilization. A two-year field experiment was conducted with a Bt cotton cultivar in the Yellow River Basin of China. The growth and yield of cotton of the upper fruiting branches were compared under four nitrogen levels: Control (N0, 0 kg ha−1), low nitrogen (N1, 120 kg ha−1), moderate nitrogen (N2, 240 kg ha−1), and high nitrogen (N3, 480 kg ha−1). The results indicated that in the subtending leaves in upper fruiting branches, chlorophyll content, protein content, and peroxidase (POD) activity dramatically increased with nitrogen application, reaching the highest under the moderate nitrogen treatment. The physiological characters in the seeds had the same trends as in the subtending leaves. Furthermore, the moderate nitrogen rate (240 kg ha−1) had a favorable yield and quality. Our results supported that a moderate nitrogen rate (240 kg ha−1) could coordinate the source–sink growth of cotton in the late stage, enhance the yield and fiber quality, and decrease the cost of fertilizer in the Yellow River Basin of China and other similar ecological areas.

scholarly journals Nitrogen fertilization of vegetables cultivated under no-tillage after cover crops

2017 ◽  
Vol 35 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Roberto BF Branco ◽  
Sally F Blat ◽  
Tais GS Gimenes ◽  
Rodrigo HD Nowaki ◽  
Humberto S Araújo ◽  
...  
Keyword(s):  
Plant Growth ◽  
Cover Crops ◽  
Nitrogen Fertilization ◽  
Nitrate Concentration ◽  
Dry Mass ◽  
Growth And Yield ◽  
No Tillage ◽  
Biological Fixation ◽  
Sunn Hemp ◽  
Nitrogen Rates

ABSTRACT The production of horticultural crops in no-tillage and in rotation with cover crops reduces the dependency in nitrogen fertilizer, due to increased soil organic matter and by biological fixation performed by legumes. Thus, the aim of this work was to study rates of nitrogen fertilization and cover crops in the agronomic performance of tomato and broccoli grown under no-tillage. The experiment was conducted in a split plot design with four replications. Treatments consisted of cover crops, sunn hemp and millet, and four rates of nitrogen fertilization (0, 50, 100 and 200 kg/ha of nitrogen), for both the tomato and broccoli crops. All soil management was performed in no-tillage. For tomato crops we evaluated the plant growth, the nitrate concentration of sprouts and fruits and yield of commercial and non commercial fruits. For broccoli we evaluated plant growth and yield. There was an interaction effect between cover crop and nitrogen rates to tomato growth measured at 100 days after transplanting, for plant height, number of fruit bunches, dry mass of leaves and diameter of the stalk. The tomato commercial fruit number and yield showed maximum values with 137 and 134 kg/ha of N respectively, on the sunn hemp straw. The nitrate concentration of the tomato sprouts was linearly increasing with the increase of nitrogen rates, when grown on the millet straw. For broccoli production, the maximum fresh mass of commercial inflorescence was with 96 kg/ha of N, when grown on the millet straw.

Effects of Nitrogen Fertilization Rate, Stockpiling Initiation Date, and Harvest Date on Canopy Height and Dry Matter Yield of Autumn-Stockpiled Bermudagrass

2004 ◽  
Vol 96 (2) ◽  
pp. 538-546 ◽  
Author(s):  
D. A. Scarbrough ◽  
W. K. Coblentz ◽  
K. P. Coffey ◽  
K. F. Harrison ◽  
T. F. Smith ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Fertilization Rate ◽  
Canopy Height ◽  
Harvest Date ◽  
Dry Matter Yield

scholarly journals Nitrogen and Flowering Dogwood. I. Impact of Nitrogen Fertilization Rate on the Occurrence of Spot Anthracnose, Powdery Mildew, and Cercospora Leaf Spot and Their Effect on Tree Growth

2008 ◽  
Vol 26 (4) ◽  
pp. 197-203
Author(s):  
A.K. Hagan ◽  
J.R. Akridge ◽  
K.L. Bowen
Keyword(s):  
Powdery Mildew ◽  
Nitrogen Fertilization ◽  
Leaf Spot ◽  
Tree Height ◽  
Fertilization Rate ◽  
Spot Intensity ◽  
Cercospora Leaf Spot ◽  
Trunk Diameter ◽  
Flowering Dogwood ◽  
N Rates

Abstract Impact of nitrogen (N) rate on spot anthracnose, powdery mildew, and Cercospora leaf spot as well as their impact on the growth of field-grown ‘Cloud 9’ and ‘Cherokee Chief’ flowering dogwood was assessed in 2003, 2004, and 2005. From 2001 to 2005, ammonium nitrate was applied at 4.1, 8.3, 16.5, 33.0 and 66.0 g N·m−2 (37.5, 75, 150, 300, 600 lb N·A−1). Heritage 50W fungicide was applied to one ‘Cherokee Chief’ and ‘Cloud 9’ flowering dogwood in each plot, while the second was untreated. Powdery mildew and Cercospora leaf spot were impacted by N rate more than spot anthracnose. In two of three years, powdery mildew intensified, particularly on the non-treated trees, as N rates increased. Cercospora leaf spot intensity (AUDPCI) and defoliation (AUDPCD) on the fungicide-treated and non-treated trees was influenced by N-rate in two of three and one of three years, respectively. Regardless of fungicide treatment, Cercospora leaf spot incited leaf spotting and defoliation was often lower at the two highest than the two lowest N rates. A reduction in the bract and leaf spot phases of spot anthracnose at the highest N rate was noted in 2004. While spot anthracnose was negatively correlated with trunk diameter in all three years and tree height in 2003 and 2004, Cercospora leaf spot intensity and defoliation were negatively correlated with tree height and trunk diameter in all three and two of three years, respectively. Powdery mildew had no impact on tree height or trunk diameter. Heritage 50W not only controlled spot anthracnose and powdery mildew but also slowed Cercospora leaf spot development sufficiently to enhance leaf retention and fall color.

scholarly journals Bush Growth and Yield of Highbush Blueberry ‘Duke’ as Influenced by Different Pruning Times in Unheated Plastic House

2021 ◽  
Vol 30 (3) ◽  
pp. 212-217
Author(s):  
Mi Geon Cheon ◽  
Seo Hyoun Lee ◽  
Kyung Mi Park ◽  
Seong-Tae Choi ◽  
Yeon Hyeon Hwang ◽  
...  
Keyword(s):  
Growth And Yield ◽  
Highbush Blueberry

scholarly journals Effect of Nitrogen and Boron Application on Carica papaya L. I. Growth and Yield

1969 ◽  
Vol 67 (3) ◽  
pp. 181-187
Author(s):  
Agripino Pérez-López ◽  
Rubén D. Reyes-Jurado
Keyword(s):  
Plant Height ◽  
Carica Papaya ◽  
Marked Effect ◽  
Fertilization Rate ◽  
Stem Diameter ◽  
Growth And Yield ◽  
Stem Height ◽  
Four Levels

The experiment was carried on a Coto clay (an Oxisol). The effect of four levels of N (0, 57, 170 and 340 kg/ha) and four levels of B (0, 2.3, 4.5, 6.8 kg/ha) were determined using the P.R. 7-65 papaya variety. Treatments were initiated when the transplanted seedlings were three months old, and were repeated every six weeks. The information recorded showed the following results: Increments of N and B levels did not show a marked effect on plant height and stem diameter. Boron tended to be more effective than N in increasing stem height and diameter. The petiole fresh and dry weights increased linearly as the N and B levels were raised. The number and weight of fruits borne on female and hermaphroditic trees increased linearly as the N and 8 levels were raised. The results of the experiment showed that the papaya plant requires a high N and B fertilization rate.

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