Interaction of nutrient supply and plant density in relation to maximal yield of the swede crop

1968 ◽  
Vol 70 (3) ◽  
pp. 369-373 ◽  
Author(s):  
R. W. Lang ◽  
J. C. Holmes
Keyword(s):  
Plant Density ◽  
Total Yield ◽  
Nutrient Supply ◽  
Matter Content ◽  
Human Consumption ◽  
Dry Matter Content ◽  
Small Populations ◽  
Plant Populations ◽  
Maximal Yield ◽  
Large Populations

SUMMARYThe effects of changing plant density and nutrient supply on the yield of swedes were measured in nine experiments over 3 years. With small populations, a large nutrient supply was required to reach the maximal yield of roots, but with large plant populations the same nutrient rate depressed yield. This interaction is illustrated by a response surface, and reasons for it are discussed. The interaction is of limited importance in practice because it was small over the range of population and nutrient supply commonly used. Even with small populations, the compensation achieved by applying more fertilizer was uneconomic. On crops with large populations, such as swedes for human consumption, however, the normal recommended rate of fertilizer should not be exceeded because of loss of yield as well as increased cost. More fertilizer and greater plant density were needed to give maximal total yield (roots + tops) than of roots alone. Effects of nutrient supply and plant population on plant establishment and dry-matter content of the swedes are discussed.

Genetic variation amongst swede varieties and their hybrids and their response to soil fertility

1976 ◽  
Vol 87 (2) ◽  
pp. 443-446 ◽  
Author(s):  
O. A. Denton ◽  
W. J. Whittington
Keyword(s):  
Dry Matter ◽  
Total Yield ◽  
Gene Interaction ◽  
Matter Content ◽  
Root Weight ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Fresh Weight ◽  
Partial Dominance ◽  
Shoot Weight

SummaryThe mean total yield and mean fresh weight of seven swede varieties and their F1 hybrids was increased primarily by nitrogen and also by phosphorus fertilizer. There was no evidence of genotype × environment interaction for characters concerned with yield except for dry-matter content where two varieties, Best-of-All and Reform, were less stable to fertility environments than the others. Heterosis was common amongst F1 hybrids and this suggests their use in swede improvement: the inheritance pattern of root weight showed overdominance, shoot weight showed partial dominance and drymatter content showed additivity, with no evidence of gene interaction. Segregation for root fresh weight and dry-matter content occurred in F2 populations and although an overall negative correlation was found there was evidence that progeny from certain crosses gave reasonable prospects of combining both characters.

Adaptation of pearl millet (Pennisetum typhoides) to coastal New South Wales. 2. Productivity under defoliation

1973 ◽  
Vol 13 (65) ◽  
pp. 692 ◽  
Author(s):  
R Ferraris ◽  
MJT Norman
Keyword(s):  
Pearl Millet ◽  
Dry Matter ◽  
New South ◽  
New South Wales ◽  
Total Yield ◽  
Matter Content ◽  
Dry Matter Content ◽  
Late Season ◽  
South Wales ◽  
Pearl Millet Cultivars

The three pearl millet cultivars, Katherine Pearl, Tamworth and Tiflate, representing mid-season and late-season types, were grown at Camden, New South Wales (34�S). Crops were planted in November and December and subjected to cutting at heights of 10, 30 and 50 cm, at three- and six-weekly intervals, beginning six weeks after sowing. Harvested forage dry matter yield, both total and late-season, was highest under a lenient cutting regime. Late productivity was higher in late maturing varieties. The effect of delayed planting was to increase the yield and quality of late harvests, but not total yield. The yield of the hybrid Tiflate was low. Total harvested forage plus final stubble averaged 11,000 kg ha dry matter for the three cultivars. Forage quality, as assessed by leafiness, protein and organic matter digestibility, was high. With the exception of digestibility, quality was improved by intensive cutting. Late-season digestibility was insensitive to cutting treatment. Varieties differed little in quality attributes. Early dry matter content of all varieties was low, and could adversely affect animal productivity. The results indicated that for the realization of high, well distributed yields concomitant with quality, a tall stubble of about 30 cm, frequently harvested, was desirable. For late productivity, the use of a late-maturing variety can offset the effect of late planting.

scholarly journals The Effect of Polyethylene Film and Polypropylene Non-Woven Fabric Cover on Cobs Parameters and Nutritional Value of Two Sweet Maize (Zea mays L. var. saccharata Bailey) Hybrids

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 539
Author(s):  
Katarzyna Adamczewska-Sowińska ◽  
Józef Sowiński ◽  
Mirosław Anioł ◽  
Piotr Ochodzki ◽  
Roman Warzecha
Keyword(s):  
Dry Matter ◽  
Sugar Content ◽  
Soluble Sugars ◽  
Total Yield ◽  
Morphological Characteristics ◽  
Matter Content ◽  
Polyethylene Film ◽  
Woven Fabric ◽  
Dry Matter Content ◽  
F1 Hybrid

In 2012–2014, at the Research and Didactic Station of the Department of Horticulture at Wroclaw University of Environmental and Life Sciences (51°19′06′′ N, 17°03′49′′ E), field studies were conducted to evaluate the responses of two sweet maize hybrids to sowing dates (early and optimum) and five methods of maize plant coverings—polyethylene film: perforated (PE), red (PER), green (PEG), polypropylene non-woven fabric (PP), and control (C), with non-irrigation systems. Total yield and morphological characteristics of cobs were compared. In 2012 soluble sugars and carotenoids content were measured. The use of maize cover at the beginning of growth (PE and PER) significantly influenced the number of rows, while PE and PEG increased the number of grains per cob. Covering maize sown at a later date, with polyethylene film and non-woven fabric, ensured better production effects than using such covers after earlier sowing. Signet F1 hybrid was charact0erized by significantly higher sugar content and Rustler F1 by higher lutein and zeaxanthin levels. The application of the optimum sowing date resulted in a significantly higher yield of cobs, by 11.3%, than after early sowing. The yield increase as a result of the applied covers was higher after sowing at a later date. The content of dry matter in grains was positively correlated with the content of sucrose, glucose, and fructose. The change in carotenoids content also depended on the accumulation of dry matter in the kernels. The study confirmed the correlation of sweet maize accumulated growing degree days (AGDD), and revealed dependence of grain quality on dry matter content in the grain.

scholarly journals EFFICIENCY APPLICATIONS OF DOMESTIC PUMPKIN ROOTSTOCKS FOR GRAFTING CUCUMBER IN PROTECTED GROUND

REPORTS ◽  
2021 ◽  
Vol 2 (336) ◽  
pp. 119-126
Author(s):  
A. Zh. Shoibekova ◽  
S. K. Dzhantassov ◽  
A. O. Nussupova
Keyword(s):  
Total Yield ◽  
Fruit Weight ◽  
Matter Content ◽  
Vegetable Production ◽  
Dry Matter Content ◽  
Vegetable Crops ◽  
Ground Conditions ◽  
Environmentally Safe ◽  
Growth Development ◽  
Growing Conditions

When growing herbaceous vegetable crops in the world practice, great importance is given to the use of grafting method. The development of environmentally safe methods to increase the yield and resistance of plants to adverse growing conditions is very relevant in vegetable production. One such method in pumpkin crops is grafting. The aim of our work was to study the effect of domestic pumpkin rootstock on growth, development and yield characteristics of cucumber hybrid using grafting method. Grafting on pumpkin species improved the growth and development of plants depending on the rootstock, compared with rootstock plants. The aim of our research was to study the influence of domestic pumpkin rootstock on the growth, development and yield characteristics of the cucumber hybrid (scion). As a scion, the variety (Asylum), recommended for cultivation in protected ground conditions, was used, which was grafted on five domestic rootstocks: 1 (Mozoleevskaya 10), 2 (Karina), 3 (Aphrodite), 4 (Mindalnaya) and Russian selection 5 (Stofuntovaya) pumpkins from vegetable and melon crops. According to the generally accepted method, the graft was grafted (cucumber Asylum) on the rootstocks of pumpkin. Using a sample of pumpkin 1 (Mozoleevskaya 10), flowering began on the fifth day earlier in comparison with non-grafted plants, and when grafting on a sample of pumpkin 4 (Aphrodite), the fruit ripened earlier by six days. To get the greatest increase in early productivity by 30%, it is possible to use both rootstocks. A significant increase in total yield was provided by samples of rootstocks 2 (Karina) – 3.9 kg/m2 and 3 (Stofuntovaya) - 8.0 kg/m2. The grafted cucumber plants with all the rootstocks used were superior to the root ones in height, in terms of the percentage of marketability of fruits and in terms of fruit weight. At the beginning of fruiting on grafted cucumber plants, the number of female flowers increased depending on the sample. In all grafted plants, the dry matter content in the fruit increased significantly. Because of our research, rootstocks 2 (Karina) and 3 (Stofuntovaya) were noted, which are recommended for use in further research breeding work and the production of grafted plants.

scholarly journals Genotype Effect on Proximate and Mineral Analysis of Safflower as a Green Leafy Vegetable

2020 ◽  
Vol 12 (11) ◽  
pp. 260
Author(s):  
Onkgolotse G. Moatshe ◽  
Vallantino E. Emongor ◽  
Patrick K. Mashiqa
Keyword(s):  
Block Design ◽  
Field Trials ◽  
Matter Content ◽  
Leafy Vegetable ◽  
Human Consumption ◽  
Dry Matter Content ◽  
Crude Fibre ◽  
Green Leafy Vegetable ◽  
Growing Seasons ◽  
Genotype Effect

Two field trials were carried out at the Botswana University of Agriculture and Natural Resources Content Farm (59o24′S, 95o25′E and 993 m above sea level) in Southern Region of Botswana, to evaluate the effects of genotypes on proximate and mineral composition of safflower leaves. Five safflower genotypes (Kiama composite (local), Sina-PI-537598, Gila-PI-537692, PI-537636 and PI-527710) were evaluated in a randomized complete block design (RCBD) with three replications. During the rosette stage safflower leaves (both petiole and blade) were harvested, dried, and ground for analysis. The results showed that safflower genotypes significantly varied in the leaf proximate content of crude protein (24-28%), crude fibre (8-14%), moisture content (86-87%) and dry matter content (13-14%) in both winter and summer growing seasons. The genotype ‘Sina’ had the highest crude fibre content compared to other genotypes. The average leaf mineral content significantly (p < 0.05) varied from 2-3 mg g-1 phosphorus, 3-4 mg g-1 calcium, 5-6 mg g-1 sodium, 15-17 mg g-1 magnesium and 15-18 mg g-1 potassium. The Na:K and Ca:P ratios ranged between 0.18 and 3.41. All the safflower genotypes evaluated had sufficient nutritional content to be used as a green leafy vegetable for human consumption and food security.

Effect of plant density on the sequential harvest yield of broccoli

1985 ◽  
Vol 25 (4) ◽  
pp. 959 ◽  
Author(s):  
B Chung
Keyword(s):  
Plant Density ◽  
Total Yield ◽  
Field Studies ◽  
Plant Populations ◽  
The Common ◽  
Marketing Problems

Field studies were conducted to determine the spear yield of three hybrid broccoli cultivars at each sequential harvest when the plants were grown at three plant populations - 2.8 (the common commercial density), 8.3 and 16.7 plants/m2. At 2.8 plants/m2, the terminal spears contribute about 60-70% of the total yield, with lateral spears contributing significantly. Almost 70% of the lateral spear yield was available at one pick 2-3 weeks after the first pick. A plant density of 8.3 plants/m2 gave a total yield of 23 t/ha, compared with 12 and 16 t/ha for 2.8 and 16- 7 plants/m2 respectively. This was due to higher yields of both terminal and lateral spears. The increase in yield at 16.7 compared with 2.8 plantdm2 was due mainly to a higher yield of terminal spears. Changing from the traditional low plant density to one of about 8 plants/m2 should increase yield significantly without causing cultural or marketing problems.

scholarly journals Physiological basics of sweet cherry productivity depending on rootstocks, interstems and plant density

2019 ◽  
Vol 4 (1) ◽  
pp. 267-274 ◽  
Author(s):  
Pavlo Bondarenko
Keyword(s):  
Sweet Cherry ◽  
Plant Density ◽  
Matter Content ◽  
Tree Canopy ◽  
Dry Matter Content ◽  
Cherry Tree ◽  
Photosynthetic Productivity ◽  
Tree Canopies ◽  
Leaf Surface Area ◽  
Gisela 5

AbstractOptical and physiological parameters in sweet cherry tree canopies at different plant density and rootstock-interstem-scion combinations were studied in order to identify the combinations that would ensure optimal passage of photosynthesis and increase yield and fruit quality. It was shown that cherry cultivars react differently to varying plant density depending on their growth habit and thus require different planting schemes. Leaves in the periphery of tree canopy had higher dry matter content per unit of leaf surface area (LSA) and increased net photosynthetic productivity (NPP) compared to leaves in the center of the canopy. This can be related to higher light interception (LI) levels in peripheral zones of the tree. Trees on interstems had higher yield than trees on own-root clonal rootstock. The complex of photosynthetic and yield indices allowed to select the best scion-rootstock-density combinations: for ‘Melitopolska chorna’ cultivar – Krymsk 5 and Gisela 5 interstems with 5 x 3 m planting scheme; for ‘Krupnoplidna’ cultivar – Gisela 5 interstem (5 x 3 m) and Krymsk 5 interstem (5 x 4 m).

scholarly journals Effect of Daily Light Integral on Composition of Hydroponic Lettuce

HortScience ◽  
2014 ◽  
Vol 49 (2) ◽  
pp. 173-179 ◽  
Author(s):  
Martin P.N. Gent
Keyword(s):  
Dry Matter ◽  
Plant Size ◽  
Time Of Day ◽  
Matter Content ◽  
Human Consumption ◽  
Dry Matter Content ◽  
Tissue Composition ◽  
Unit Leaf ◽  
Metabolite Concentrations ◽  
A Charge

The concentrations of metabolites in plants are affected by sunlight integral and other factors such as plant size, water content, and time of day. Tissue composition was measured for various sizes of hydroponic lettuce (Lactuca sativa L.) grown under seasonal variation in sunlight in a greenhouse and harvested in the morning or afternoon. Daily sunlight integral varied from 4 to 14 mol·m−2·day−1 photosynthetically active irradiance, and plant size varied from 2 to 260 g fresh weight (FW)/plant in this study. Much of the variation in tissue composition on a FW basis could be explained by the increase in dry matter content with irradiance normalized per unit area. Except for nitrate, metabolite concentrations on a FW basis increased with irradiance, and the changes resulting from irradiance were greater when harvested in the afternoon than in the morning. Nitrate concentration decreased with normalized irradiance, and the trend was the same whether measured in morning or afternoon. Malic acid increased with irradiance but not enough to counter the decrease in nitrate on a charge equivalence basis. Irradiance normalized per unit leaf area explained many effects of light and plant size on dry matter content and soluble metabolite concentrations. Lettuce for human consumption is best harvested in the afternoon after growth under high light, when it has the least nitrate and more of other nutrients.

Pollen limitation and reproduction varies with population size in experimental populations of Sabatia angularis (Gentianaceae)

Botany ◽  
2009 ◽  
Vol 87 (3) ◽  
pp. 330-338 ◽  
Author(s):  
Rachel B. Spigler ◽  
Shu-Mei Chang
Keyword(s):  
Reproductive Success ◽  
Population Size ◽  
Intraspecific Competition ◽  
Seed Set ◽  
Pollen Limitation ◽  
Small Populations ◽  
Plant Populations ◽  
Large Populations ◽  
Fruit And Seed Set ◽  
Supplemental Pollination

Individuals in large plant populations are expected to benefit from increased reproductive success relative to those in small populations because of the facilitative effects of large aggregations on pollination. As populations become small, the inability to attract sufficient numbers of pollinators can reduce reproduction via pollen limitation. This study experimentally tested whether such trends occur for the herbaceous biennial Sabatia angularis (L.) Pursh (Gentianaceae). We created artificial populations of varying size consisting of potted S. angularis plants in two field sites to determine whether population size affected mean fruit and seed set. We also examined whether population size affected the degree of pollen limitation using a supplemental pollination design in one of the sites. Our results showed that, on average, seed set was lower in large populations, not small populations, of S. angularis and that this result may be due to increased pollen limitation in large populations. We suggest that in certain contexts, small populations may enjoy reproductive advantages over large populations by escaping intraspecific competition for pollinators.

scholarly journals The effect of soil mulching with straw on the yield and selected components of nutritive value in broccoli and tomatoes

2014 ◽  
Vol 26 (1) ◽  
pp. 31-42 ◽  
Author(s):  
Edyta Kosterna
Keyword(s):  
Chemical Composition ◽  
Nutritive Value ◽  
Total Yield ◽  
Climatic Conditions ◽  
Matter Content ◽  
Soil Conditions ◽  
Slight Reduction ◽  
Dry Matter Content ◽  
Marketable Yield ◽  
Rye Straw

ABSTRACT By maintaining proper moisture and reducing daily temperature fluctuations, mulching improves soil conditions for plant growth and development, resulting in a positive effect on the vegetable yield. The chemical composition of vegetables is genetically determined as well as being modified by factors affecting the plant during growth, and particularly climatic conditions and agro-technology practices. The effects of soil mulching with rye, corn, rape and buckwheat straw at a dose of 10 and 20 t ha-1 on the yield and changes of selected components of nutritive value in ‘Milady’ F1 broccoli and ‘Polfast’ F1 tomato were investigated. The effect of straw was compared to a control plot without mulch. The yield of the vegetables and their chemical composition depended to a higher degree on weather conditions in the years of study. 2010 was the most favourable for broccoli yielding and 2011 for tomato. More nutrients components in heads and fruits were found in 2011 and 2012, which were characterised by favourable rainfall distribution. All straws applied in the experiment, irrespective of dosage, caused an increase in broccoli yield. However, soil mulching with straw at a dose of 10 t ha-1 was better for tomato yielding. Soil mulching with rye, corn and buckwheat straw increased the share of marketable yield in the total yield of broccoli and rye straw as well as the share of marketable yield of tomato. Mulching with rape and buckwheat straw decreased dry matter content in the edible parts of the vegetables. Mulch with rye straw contributed to a decreased content of ascorbic acid in heads and fruits and also caused a slight reduction in tomato flesh acidity. However, soil mulching with corn and rape straw caused an increase in total sugars and monosaccharide content in broccoli and tomato.

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