Effect of nitrogen and potassium on the yield and quality of irrigated Brussels sprouts (Brassica oleracea L. var. gemmifera) cvv. Roger and Oliver grown in South Australia

1996 ◽  
Vol 36 (7) ◽  
pp. 877 ◽  
Author(s):  
CMJ Williams ◽  
NA Maier ◽  
MJ Potter ◽  
GG Collins
Keyword(s):  
Brassica Oleracea ◽  
Sandy Loam ◽  
Total Yield ◽  
Maximum Yield ◽  
South Australia ◽  
Sprinkler Irrigation ◽  
Yield Response ◽  
Brussels Sprouts ◽  
Silty Loam ◽  
Brassica Oleracea L

This study was conducted to assess the effects of nitrogen (N) and potassium (K) on the yield and size distribution of Brussels sprouts (Brassica oleracea L. var. gemmifera) grown with sprinkler irrigation in the Mt Lofty Ranges, South Australia. The cultivars grown were Oliver and Roger which are early and mid season types, respectively. Yields of swollen axillary buds or Brussels sprouts were assessed over 4-7 harvests. Five rates of N (0, 125, 250, 375, 600 kg/ha) with 3 rates of K (0, 150, 300 kg/ha) were applied over 8 side-dressings during the 7-8-month cropping period in randomised block experiments. Four experiments were conducted during 1992-93 (sites 1 and 2) and 1993-94 (sites 3 and 4) on silty loam, loam and sandy loam soils. The effect of N and K on sprout colour was determined at sites 3 and 4. Thiocyanate concentrations in sprouts and the bitterness of sprouts, from the nil and highest K treatment, and from plants in the crop adjacent to the experimental area, were determined for sites 1 and 2. In 3 of the 4 experiments, applied N significantly (P<0.001) increased total yield of sprouts harvested. Yield increases due to applied N ranged from 51 to 78%. At site 1 (cv. Oliver), there was no yield response to applied N but at sites 2 and 4 (cv. Roger) and site 3 (cv. Oliver), 319, 377 and 383 kg N/ha, respectively were required for 95% maximum yield. At responsive sites, application of N significantly increased both yield of sprouts at all harvests except harvest 1, and yield of 20-<30 and 30-<40 g sprouts, which are the preferred size ranges. Increasing rates of N significantly (P<0.05) increased yield of 240 g or large sprouts at all 3 responsive sites. The effect of applied N on sprout colour was inconsistent. At site 4, application of N significantly (P<0.001) increased the mean colour rating of sprouts, in contrast, at site 3 the effect was not significant (P>0.05). At both sites, mean colour ratings decreased during the harvest period irrespective of N applied. Total yield, size and colour of sprouts were not significantly (P>0.05) affected by rate of applied K at any site. It was concluded that extractable K concentrations of 140-260 mg/kg in the surface (0-15 cm) soils were adequate and not limiting yield. At site 1, thiocyanate concentration in sprouts and sprout bitterness increased significantly (P<0.001) when the highest rate of K2SO4 was applied. At site 2, which had received higher rates of sulfate-based fertilisers in previous years, the effect was not significant (P>0.05). This finding suggests that application of high rates of K2SO4 to Brussels sprouts should be avoided to ensure bitterness does not adversely affect the marketability of sprouts.

Cole crop yield response to reduced nitrogen rates

1999 ◽  
Vol 79 (1) ◽  
pp. 149-151 ◽  
Author(s):  
K. R. Sanderson ◽  
J. A. Ivany
Keyword(s):  
Brassica Oleracea ◽  
Yield Response ◽  
Marketable Yield ◽  
Brussels Sprouts ◽  
Control Banding ◽  
Reduced Nitrogen ◽  
N Rates ◽  
Nitrogen Rates ◽  
Cole Crop ◽  
Brassica Oleracea L

Response of cabbage (Brassica oleracea L. var. capitata), Brussels sprouts (Brassica oleracea var. gemmifera) and broccoli (Brassica oleracea L. var italica) to reduced N rates was studied over 4 yr. Treatments were application methods, broadcast, split and banded with two rates of N; 120 and 90 kg ha−1 plus a control of 150 kg ha−1 broadcast N. Marketable yield was lower by 15, 23, and 13%, respectively, compared to the control. Banding lowered yield of cabbage and broccoli. The lower N rate had the lowest yield in all crops. Leaf N concentration varied with N rate. Key words: Broccoli, Brussels sprouts, cabbage, reduced nitrogen, yield

Fungicide control of ringspot (Mycosphaerella brassicicola) in Brussels sprouts

1987 ◽  
Vol 27 (4) ◽  
pp. 597 ◽  
Author(s):  
T Wicks ◽  
G Lomman ◽  
IS Rogers
Keyword(s):  
Brassica Oleracea ◽  
Total Yield ◽  
South Australia ◽  
Brussels Sprouts ◽  
Mature Leaves ◽  
Final Harvest ◽  
Fungicide Control

A population of Mycosphaerella brassicicola insensitive to carbendazim (a benzimidazole fungicide) has developed in the main brussels sprouts (Brassica oleracea var. gemmifera) growing area of South Australia. This was evident in a fungicide evaluation experiment in 1986 where ringspot developed despite 9 applications of carbendazim (250 mg a.i./L) on a 10-14-day schedule, whereas in the same area 4 benomyl applications (250 mg a.i./L) on a 21- day schedule controlled the disease in 1970. In 1986, other fungicides such as the protectant chlorothalonil (800 mg a.i./L), and the systemics fenarimol (37.5 mg a.i./L), penconazole (25 mg a.i./L) and triadimefon (125 mg a.i./L) controlled the benzimidazole insensitive strain when applied every 10-14 days. On sprayed plants, fewer than 3 ringspot lesions developed on infected mature leaves, whereas on unsprayed and carbendazim treated plants, more than 100 lesions per leaf developed by the final harvest. Total yield of sprouts was significantly reduced (P = 0.05) in unsprayed plants and half of these were unmarketable compared with more than 80% of the sprouts being marketable in most of the sprayed plots.

scholarly journals Effect of plant density on the growth, development and yield of brussels sprouts (Brassica oleracea L. var. gemmifera L.)

2014 ◽  
Vol 67 (4) ◽  
pp. 51-58 ◽  
Author(s):  
Victor Alekseevich Turbin ◽  
Artem Siergiejevicz Sokolov ◽  
Edyta Kosterna ◽  
Robert Rosa
Keyword(s):  
Brassica Oleracea ◽  
Plant Density ◽  
Maximum Yield ◽  
Important Variable ◽  
Marketable Yield ◽  
Brussels Sprouts ◽  
Head Formation ◽  
Stalk Diameter ◽  
Growth Development ◽  
Brassica Oleracea L

Plant density is an important variable for achieving maximum yields and uniform vegetable maturity. Optimal plant density can be achieved by establishing appropriate distances both between the rows as well as in the rows of plants. The experiment was carried out between 2010–2012 at the experimental field of the Crimean Agrotechnological University in Simferopol, Ukraine. The experiment was established as randomised blocks with four replications. This study aimed to determine the effect of plant density on the growth, development and yield of Brussels sprouts. Increasing the area per plant resulted in a shortening of the time to the beginning of head formation, technical maturity and harvest. In all study years, increasing the distance between plants caused an increase in leaf assimilation area, stalk diameter and the number of heads per plant, however, the height of plants was lower. The most favourable parameters characterising marketable yield were found at an area per plant of 0.56 m<sup>2</sup>, however, the maximum yield from 1 ha (determining the profitability of the cultivation) was found at an area of 0.49 m<sup>2</sup> per plant.

The effect of aerated hydration on DNA synthesis in embryos of Brassica oleracea L.

1993 ◽  
Vol 3 (3) ◽  
pp. 195-199 ◽  
Author(s):  
J. M. Thornton ◽  
A. R. S. Collins ◽  
A. A. Powell
Keyword(s):  
Dna Damage ◽  
Dna Replication ◽  
Dna Synthesis ◽  
Brassica Oleracea ◽  
Thymidine Incorporation ◽  
Recovery Process ◽  
Time Difference ◽  
Brussels Sprouts ◽  
Brassica Oleracea L

AbstractAgeing causes a delay in the onset of DNA replication in seeds. Aerated hydration for 8 h, a treatment to invigorate seeds, resulted in a reduction of about 12 h in the time difference in the onset of DNA synthesis between unaged and aged embryos of brassica seed. This effect is consistent with a recovery process occurring during aerated hydration of the seed involving the repair of accumulated DNA damage. The occurrence of hydroxyurea-resistant 3H-thymidine incorporation in aged Brussels sprouts embryos during the period 16–32 h from the start of hydration supports this interpretation.

scholarly journals Growth and Yield Response to Fertilizer Application and Nutritive Quality of Huckleberry (Solanum scabrum Mill.) Varieties Cultivatedin the Mount Cameroon Region

2019 ◽  
pp. 1-12
Author(s):  
Mbah H. Agwa ◽  
Ndah R. Njoh ◽  
Egbe E. Andrew
Keyword(s):  
Crude Protein ◽  
Lateral Roots ◽  
Total Yield ◽  
Maximum Yield ◽  
Poultry Manure ◽  
Growth And Yield ◽  
Heat Extraction ◽  
Yield Response ◽  
Fertilizer Treatment ◽  
Carotene Content

This study evaluated the effects of fertilizer on growth, yield and the nutritive value of three varieties of huckleberry (“White stem”, “Bamenda” and “Foumbot”). The treatments were NPK (20:10:10) at levels 0, 100, 150, 200Kg/ha and 10 Mg/ha poultry manure and the experiment was a randomized complete block design with three replicates. The Kjeldahl procedure was used for crude protein determination. The lipid content was determined with the soxlet reflux heat extraction method. The ß-carotene content was determined using spectrophotometry. Results indicated that plants supplied with 200 Kg NPK/ha fertilizer treatment had the highest plant height (66 cm) and leaf number (242) in “White stem” and “Bamenda” varieties respectively and these were significantly different from the control (P = 0.05). Leaf area was highest in “Foumbot” variety (343.1 cm2). The longest tap root length and number of primary lateral roots were noted particularly in “White stem” control plants and this was significantly different (P = 0.05) from plants supplied with fertilizers. Plants supplied with 10 Mg/ha poultry manure recorded the highest total yield for “White stem” (44.83 Mg/ha) while plants supplied 200 Kg NPK/ha had maximum yield for the “Bamenda” and “Foumbot” varieties (36.96 and 31.84 Mg/ha respectively). The “White stem” variety had the highest crude protein (303.8 mg/100 g) and ß-carotene content (1.9 mg/100 g); “Bamenda” variety had the highest total lipid (8.15%), and crude fibre (14.15%) contents, while total ash was highest in “Foumbot” (16.54%). Appropriate fertilizer levels would considerably improve huckleberry yield as well as improve income of vegetable farmers.

The availability of potassium in some Tasmanian soils. II. Exhaustive cropping in relation to potassium reserves in the soil

1960 ◽  
Vol 11 (5) ◽  
pp. 774 ◽  
Author(s):  
CS Piper ◽  
Vries MPC de
Keyword(s):  
Sandy Loam ◽  
South Australia ◽  
Subterranean Clover ◽  
Yield Response ◽  
Exchangeable Potassium ◽  
Severe Deficiency ◽  
Intensively Managed ◽  
High Level ◽  
Yield Responses ◽  
Severe Leaf

Five soil samples from Fingal, Tas., representing Frodsley sandy loam of varying exchangeable potassium status, were subjected to exhaustive cropping in pots and the changes in their potassium status and that of the crops measured. Three of the samples represented an area carrying improved pastures while two were from a less intensively managed property. The results were contrasted with those from two soils from South Australia (Urrbrae loam and Seddon gravelly sandy loam). The progressive removal of potassium by cropping was determined by analysis of each crop and of the soil at the end of the experiment. Uptake and removal of potassium was greatest from the soils of highest exchangeable potassium status. Potassium applied to the soils was also rapidly taken up by the crops. For the Tasmanian soils, applications of potassium gave no responses in yield until the level of exchangeable potassium in the control pots fell to 0.10-0.15 m-equiv./100 g. The higher the initial level of exchangeable potassium, the greater the number of crops before a yield response to applied potassium was obtained. In contrast, yields were maintained at a high level on Urrbrae loam and, even in the fourth crop, applications of potassium gave only a barely significant response. From Frodsley and Seddon soils only small amounts of potassium were taken up from non-exchangeable sources. From Urrbrae loam, in the absence of applied potassium, slightly more than half of the potassium taken up by the crops was derived from other than exchangeable sources. These differences were in keeping with the different amounts of potassium released to boiling nitric acid by these soils. After four crops exchangeable potassium was reduced to very low levels (0.05-0.14 m-equiv./100 g) in all five Tasmanian soils. These values were directly related to the amounts of difficultly exchangeable potassium in these soils. Exchangeable potassium in Urrbrae loam was not reduced below 0.33 m-equiv./100 g, again reflecting the higher reserve of difficultly exchangeable potassium in the illitic clay of this soil and its greater capacity to replenish the exchangeable potassium fraction. The percentage of potassium in the dry matter of the crop was closely related to the level of exchangeable potassium or exchangeable plus added potassium in the soil. Subterranean clover showing severe leaf necrosis due to potassium deficiency contained 0.55-0.63 per cent. potassium. Plants showing less severe deficiency symptoms or symptoms developing at a later stage showed 0.84-0.98 per cent. potassium. Plants with 1.20 per cent. potassium were free from symptoms and gave no further yield responses to applied potassium. Additions of potassium to the soil led to higher values in the plants, and luxury uptake was common. At least 84-95 per cent. of the applied potassium was taken up by the crops on four of the Tasmanian soils.

Heavy Metals Accumulation in Cauliflower (Brassica Oleracea L. var. Botrytis) Grown in Brewery Sludge Amended Sandy Loam Soil

2014 ◽  
Vol 2 (3) ◽  
pp. 87 ◽  
Author(s):  
Babu Ram Khanal ◽  
Shree Chandra Shah ◽  
Shrawan Kumar Sah ◽  
Chandeshwor Prasad Shriwastav ◽  
Bharat Sharma Acharya
Keyword(s):  
Heavy Metals ◽  
Brassica Oleracea ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Heavy Metals Accumulation ◽  
Loam Soil ◽  
Metals Accumulation ◽  
Brassica Oleracea L
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