Influence of nitrogen fertilization on yield, hollow stem incidence and sap nitrate concentration in broccoli

2001 ◽  
Vol 81 (4) ◽  
pp. 765-772 ◽  
Author(s):  
C. Bélec ◽  
S. Villeneuve ◽  
J. Coulombe ◽  
N. Tremblay
Keyword(s):  
Nitrogen Fertilization ◽  
Nitrate Concentration ◽  
Absolute Threshold ◽  
Fertilizer Application ◽  
Nitrate Content ◽  
Nitrogen Application ◽  
Marketable Yield ◽  
Fertilization Rates ◽  
Yield And Quality ◽  
Application Rates

This study, spanning 2 yr at two different sites, compared the effects of nitrogen fertilization on broccoli yield and quality in relation to the influence of site and production season. This research also evaluated the potential use of measuring nitrate in petiole extracts to determine broccoli nitrogen requirements when making a second fertilizer application 5 wk after transplant. Treatments consisted of factorial combinations of three nitrogen fertilization rates at transplant (Nmin, 50-Nmin and 100-Nmin kg N ha–1, where Nmin was the soil nitrate concentration) and four nitrogen fertilization rates 5 wk after transplant (0, 50, 100 and 150 kg N ha–1). The marketable yield of broccoli increased with the rate of nitrogen application. Hollow stem incidence showed the same trend as yield, and was greatest when high levels of nitrogen were applied 5 wk after transplant. Interactions between the 5-wk nitrogen application and production year, as well as growing site were significant. The nitrate content of the sap was measured immediately before the 5-wk nitrogen application and 2 wk later. The nitrate concentration measured at 5 wk increased with transplant nitrogen, as did the concentration measured at 7 wk. Nitrate concentration at 7 wk increased curvilinearly with the 5-wk fertilizer application rates. Sap analysis provided clear evidence of the effect of nitrogen application rates, but Environment precluded determination of an absolute threshold of nitrate sufficiency in the sap. Key words: Brassica oleracea L. var. Italica, split application, quality, environment

scholarly journals Yield formation and quality characteristics of early potatoes during a short growing period

2008 ◽  
Vol 13 (4) ◽  
pp. 390 ◽  
Author(s):  
L. MUSTONEN
Keyword(s):  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Tuber Yield ◽  
Sugar Content ◽  
Matter Content ◽  
Nitrate Content ◽  
Dry Matter Content ◽  
Nitrogen Application ◽  
Yield And Quality

The effects of nitrogen fertilization on the yield and quality of early potato (Solanum tuberosum L.) were studied at MTT Agrifood Research Finland during 1996–1997. Cultivars were harvested at three times. The experimental layout was a split-split-plot with harvest times as main plots and nitrogen fertilization and potato cultivars as the subplots. The fertilizer treatments were 60 and 120 kg N ha-1 and the cultivars tested were Timo, Gloria and Van Gogh. The harvest times were 57–62, 70–75 and 85–90 days after planting. Application of 120 kg N ha-1 intensifi ed canopy development and increased leaf area of the stands. At early harvest the tuber yield of all cultivars receiving the higher nitrogen application increased by 0.5–2.5 t ha-1. The highest yielding cultivar was Timo. At last harvest, the higher nitrogen treatment increased yield by 3.0–6.2 t ha-1. The highest yielding cultivars were Timo and Van Gogh. The dry matter content of tubers was very low, 13.8–17.2%, at the fi rst harvest and the higher nitrogen application reduced dry matter content by 0.3–1.0%. The highest fertilizer application rate resulted in the largest tuber size. Nitrogen application, however, affected the quality of potatoes by decreasing the dry matter content. The nitrate content in tubers increased signifi cantly with the increasing level of nitrogen. The range of nitrate content in tubers fl uctuated between 13 and 189 mg kg-1 fresh weight showing good controlling of nitrate values. Harvest time affected sucrose content and the reducing sugar content in tubers, but nitrogen fertilizer did not change the sugar content of tubers. As tuber yield and quality during a short growing season are affected mainly by intercepted radiation, methods to increase tuber yield should focus on reducing the time to emergence, improving haulm growth after emergence and increasing the harvest index.;

scholarly journals Fodder Beet (Beta Vulgaris Var Crassa) Yield and Quality Attributrs As Affected By Nitrogen Fertilization and Foliar Boron Application

2020 ◽  
pp. 1-6
Author(s):  
Entessar Al-Jbawi ◽  
◽  
Faddi Abbas ◽  
Keyword(s):  
Nitrogen Fertilization ◽  
Yield Components ◽  
Dry Matter ◽  
Foliar Application ◽  
Dry Matter Yield ◽  
Root Yield ◽  
Fodder Beet ◽  
Fertilization Rates ◽  
Yield And Quality ◽  
Scientific Agriculture

A field experiment was conducted during two seasons 2018/2019 and 2019/2020 at Homs Agriculture Research Center, General Commission for Scientific Agriculture Researches (GCSAR), Syria, to study the effect of nitrogen fertilization rates and foliar application of boron on root yield and quality and dry matter yield of fodder beet. Results showed that the effect of nitrogen fertilization was significant (p≤0.001) for all studied traits except brix%. The effects were significant positive on root, shoot and biological yields, sucrose percentage, root, shoot and total dry matter yields. On the other hand the effect of boron spraying was presented for each season separately, because the differences of boron treatments were significant for all parameters except brix% at each season, and HI at the two seasons, while the differences of years were significant for all parameters except for HI. the highest yield and yield components were achieved by adding 300 kg N/ha with the addition of boron under Homs governorate conditions.

Effect of nitrogen fertilization on head size, vitamin C content and storage life of broccoli (Brassica oleracea var. Italica)

1994 ◽  
Vol 74 (3) ◽  
pp. 607-610 ◽  
Author(s):  
Peter M. A. Toivonen ◽  
B. J. Zebarth ◽  
P. A. Bowen
Keyword(s):  
Vitamin C ◽  
Brassica Oleracea ◽  
Nitrogen Fertilization ◽  
Fertilization Rate ◽  
Climatic Conditions ◽  
Head Size ◽  
First Year ◽  
Nitrogen Application ◽  
Application Rates ◽  
And Storage

Broccoli quality in British Columbia can vary with season and with the farm site on which it is grown. One major management difference between farms is nitrogen fertilization rate. This work was conducted to determine the effect of nitrogen fertilization (0, 125, 250, 375, 500 and 625 kg N ha−1) and growing season (three plantings in 2 consecutive years) on vitamin C content, head size and storability of broccoli (Brassica oleracea var. Italica, 'Emperor'). The climatic conditions during crop growth and development had a greater overall effect on vitamin C content, head diameter and head weight than nitrogen fertilization. Weight and vitamin C losses during storage in the first year were not affected by nitrogen fertilization rates. Moderate nitrogen application rates of 125 and 250 kg N ha−1 in all three plantings produced a head size considered optimal for marketing. Key words: Postharvest, vegetable quality, climatic conditions

scholarly journals The effect of biodegradable direct covers on the root development, yield and quality of cucumber

2014 ◽  
Vol 26 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Izabela Zawiska ◽  
Piotr Siwek
Keyword(s):  
Root Development ◽  
Dry Matter ◽  
Soluble Sugars ◽  
Average Diameter ◽  
Field Studies ◽  
Nitrate Content ◽  
Marketable Yield ◽  
Yield And Quality ◽  
Yield Quality ◽  
Whole Plants

ABSTRACT The results of three years (2009-2011) of field studies using two types of biodegradable nonwoven covers (aromatic polyester IBWCH 75 g m-2 and polylactic acid PLA 54 g m-2) on the yield, quality and root development of cucumber are presented. Seeds of parthenocarpic cucumber (‘Mirabelle’ F1) were sown directly into the field at the beginning of May/June and covered with nonwoven field covers. A plot that remained uncovered served as the control. The covers were kept in place until the first flowers appeared. Cucumbers were harvested every three days for 5-6 weeks. Fruits were evaluated for dry matter, soluble sugars and nitrate content. After the last harvest, whole plants were harvested and evaluated for weight, surface area, total length and average diameter of the roots. The experiment showed that the covers increased the marketable yield of cucumber in 2009 and 2010 (regardless of the type of polymer), but did not influence the yield in 2011. In 2011 the fruits from the covered plots had higher levels of soluble sugars and dry matter in comparison to the control. The covers did not influence root development.

scholarly journals THE EFFECTS OF CROP ROTATIONS AND NITROGEN RATES ON PROCESSING TOMATO YIELDS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 622f-622
Author(s):  
Russell Johnston ◽  
Vernon Shattuck ◽  
John Seliga
Keyword(s):  
Experimental Design ◽  
Nitrogen Fertilizer ◽  
Nitrogen Fertilization ◽  
Crop Rotations ◽  
Marketable Yield ◽  
Fertilization Rates ◽  
Processing Tomato ◽  
Nitrogen Rates ◽  
Individual Rate ◽  
Processing Tomatoes

The influence of various crop rotations on the marketable yield of processing tomatoes (Lvcopersicon esculentum) in southwestern Ontario was investigated. The study was conducted for three years using nine and eight crop rotations at Leamington and Dresden, respectively. Four rates of nitrogen, 0, 45, 90, and 135 kg/ha were applied to each rotation. The treatments were arranged in a split-plot experimental design. Tomato yields were generally higher at both locations for all rotations compared to continuously grown tomatoes (control). The highest yields were obtained when tomatoes were grown in an alfalfa (Medicago sativa) rotation and rotations involving rye (Secale cereale) or winter wheat (Triticum aestivum). Tomato yields from the soybean (Glycine max) rotation and from continuously grown tomatoes were similar. At both locations, yields from continuously grown tomatoes increased with increasing rates of nitrogen fertilizer. Optimal yields for each rotation varied with each individual rate of nitrogen. Tomatoes grown in the alfalfa rotation showed the least response to higher rates of applied nitrogen. Our data indicates that certain crop rotations and nitrogen fertilization rates can be used together to enhance the yield of processing tomatoes.

scholarly journals Effect of Nitrogen Application Rates on the Nitrogen Utilization, Yield and Quality of Rice

2021 ◽  
Vol 12 (01) ◽  
pp. 13-27
Author(s):  
Hanling Liang ◽  
Shiyu Gao ◽  
Jingxuan Ma ◽  
Tian Zhang ◽  
Tianyu Wang ◽  
...  
Keyword(s):  
Nitrogen Utilization ◽  
Nitrogen Application ◽  
Yield And Quality ◽  
Application Rates

scholarly journals The effect of different nitrogen fertilization rates on yield and quality of marigold (Calendula officinalis L. 'Tokaj') raw material

2012 ◽  
Vol 64 (3) ◽  
pp. 29-34
Author(s):  
Beata Król
Keyword(s):  
Nitrogen Fertilization ◽  
Raw Material ◽  
Control Treatment ◽  
Calendula Officinalis ◽  
Fertilization Rates ◽  
Yield And Quality ◽  
Significant Difference ◽  
Pot Marigold ◽  
Nitrogen Rates

Pot marigold (<i>Calendula officinalis</i> L.) is an annual ornamental plant which is also grown for herbal raw material (flower heads) used in the pharmaceutical and cosmetic industries. A field experiment was carried out in the years 2006-2008 in the Experimental Farm of the University of Life Sciences in Lublin. The study was conducted on loess soil with the granulometric composition of silt loam. The aim of the experiment was to determine the effect of different nitrogen rates (0, 40, 80, 120, 160 kg N × ha<sup>-1</sup>) on some morphological features of flower heads as well as on yield and quality of pot marigold raw material. Flowering of pot marigold was shortest in the control treatment (32 days) and longest (43 days) in the plot where nitrogen fertilization had been applied at the highest rate (160 kg N × ha<sup>-1</sup>). Nitrogen fertilization had a significant influence on the number of flower heads per plant, but no significant difference was found in diameter as well as in ligulate flowers and tubular flowers in the flower head. It was found to increase significantly raw material yield after the application of 80 kg N × ha<sup>-1</sup>, compared to the control treatment. Yield of flower heads did not differ markedly for fertilization rates from 80 to 160 kg N × ha<sup>-1</sup>. Nitrogen fertilization modified slightly essential oil content (this content increased with increasing nitrogen rates), but at the same time it decreased the percentage of flavonoid compounds.

Effect of Nitrogen Fertilization on Yield and Quality of Endive

2009 ◽  
Vol 70 (1) ◽  
pp. 193-201 ◽  
Author(s):  
Katarzyna Adamczewska-Sowińska ◽  
Cecylia Miłowana Uklańska
Keyword(s):  
Nitrogen Fertilization ◽  
Nutritional Value ◽  
Growth Yield ◽  
Dry Weight ◽  
Application Rate ◽  
Marketable Yield ◽  
Nitrate Accumulation ◽  
Yield And Quality ◽  
Nitrogen Application Rate

Effect of Nitrogen Fertilization on Yield and Quality of EndiveThe aim of the experiments carried out in 2007-2008 was to assess the effect of various nitrogen doses on the growth, yield and nutritional value of two endive cultivars Cigal and Excel. The effects of two types of fertilizers were compared: that of ammonium nitrate with that of the product Entec-26. On the basis of the results obtained, it was shown that endive cv. Excel produced a marketable yield that was on average by 35.5% higher than that of the cultivar Cigal. A significantly higher marketable yield of endive was obtained by fertilizing with a single dose of the fertilizer Entec-26, particularly at the rates of 90 and 135 kg N·ha-1, and also 180 kg N·ha-1. The experiments also revealed a significant effect of the fertilization method and nitrogen application rate on the biological value of the endive cultivars under evaluation. The cultivar Excel was characterized by a higher degree of nitrate accumulation, whereas the cultivar Cigal had a higher vitamin C content, dry weight, and chlorophyll content.

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