scholarly journals Influence of the seeding rate and substrates on the cultivation of oil radish microgreens

2021 ◽  
pp. 65-68
Author(s):  
Larisa A. Sokolova ◽  
Vera A. Vasilyeva
Keyword(s):  
Population Density ◽  
Growth And Development ◽  
Water Regime ◽  
Foam Glass ◽  
Average Height ◽  
High Porosity ◽  
Seeding Rate ◽  
Average Mass ◽  
Inert Substrate ◽  
Series Of Experiments

In 2 series of experiments, the influence of population density and substrates on the growth and development of microgreens in oil radish was studied. In the optimum zone were crops with a density of 5 and 7 g of seeds per container with an area of 144 cm2. At higher seeding densities, the plants lagged significantly behind in growth. Their average height was 1.5 times less, and the average mass of microgreens per 1 g of sown seeds decreased 2-2.5 times. A new inert substrate, foam glass, was tested. Possessing high porosity, it provided an optimal water-air regime for plants. Comparison of growing microgreens on soil and foam glass showed the advantage of foam glass — the mass of plants on it was slightly larger. Despite the optimal air-water regime created by the foam glass, the diameter of the stones of 1.5-3 cm turned out to be excessively large and created inconvenience for growing microgreens.

scholarly journals Influence of the seeding rate and substrates on the cultivation of oil radish microgreens

2021 ◽  
pp. 65-68
Author(s):  
L. A. Sokolova ◽  
V. A. Vasilyeva
Keyword(s):  
Population Density ◽  
Growth And Development ◽  
Water Regime ◽  
Foam Glass ◽  
Average Height ◽  
High Porosity ◽  
Seeding Rate ◽  
Average Mass ◽  
Inert Substrate ◽  
Series Of Experiments

In 2 series of experiments, the influence of population density and substrates on the growth and development of microgreens in oil radish was studied. In the optimum zone were crops with a density of 5 and 7 g of seeds per container with an area of 144 cm2. At higher seeding densities, the plants lagged significantly behind in growth. Their average height was 1.5 times less, and the average mass of microgreens per 1 g of sown seeds decreased 2-2.5 times. A new inert substrate, foam glass, was tested. Possessing high porosity, it provided an optimal water-air regime for plants. Comparison of growing microgreens on soil and foam glass showed the advantage of foam glass — the mass of plants on it was slightly larger. Despite the optimal air-water regime created by the foamglass, the diameter of the stones of 1.5-3 cm turned out to be excessively large and created inconvenience for growing microgreens.

scholarly journals Plantain-Tree Rubber Intercropping Systems Improved Productivity in the Tropical Humid Zone of Ghana, West Africa

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Erasmus Narteh Tetteh ◽  
Eric Owusu Danquah ◽  
Akwasi Adutwum Abunyewa ◽  
Caleb Melenya Ocansey ◽  
Emmanuel Amoah Boakye ◽  
...  
Keyword(s):  
Population Density ◽  
Growth And Development ◽  
Positive Relationship ◽  
Cropping Systems ◽  
Block Design ◽  
Rubber Tree ◽  
Western Region ◽  
Optimum Population ◽  
Randomized Complete Block Design ◽  
Sole Cropping

A three-year field trial was conducted between 2014 and 2017 in the Ellembelle and Jomoro districts of the Western region of Ghana where rubber production is common to determine the optimum population density of plantain when grown in combination with immature rubber tree crops. The trials were arranged in a Randomized Complete Block Design with 3 replications. The treatments were sole rubber, sole plantain, and three intercrops of one row of plantain in between two rows of rubber, two rows of plantain in between two rows of rubber, and three rows of plantain in between two rows of rubber. The rubber clone used was GT1 while the variety of plantain used was false horn. The results showed that population density of plantain had significant effect on the growth of the associated rubber. Growing plantain at closer spacing of 1.5 m under the high-density plantain treatment significantly increased plantain yield compared to the other cropping systems. There was a significant positive relationship between population density of plantain and the rubber tree growth and development. The optimum population density of plantain when intercropped with rubber was 1,666/ha. The study showed intercropping was advantageous over sole cropping for both crops.

XII.—A Study of the Effect of Diurnal Periodicity upon Plant Growth

1930 ◽  
Vol 56 (2) ◽  
pp. 247-272 ◽  
Author(s):  
George Redington
Keyword(s):  
Plant Growth ◽  
Critical Review ◽  
Growth And Development ◽  
Relevant Literature ◽  
Diurnal Periodicity ◽  
Preliminary Account ◽  
Series Of Experiments

A preliminary account of an earlier investigation of this nature has been given in a previous paper (Redington and Priestley, 1925), and it is intended to record here the results of further work, with particular reference to questions of growth and development. The new data that are presented are the result of two series of experiments, which will be called Series B and C, whilst the earlier work will be referred to as Series A. A critical review of the relevant literature has recently been published (Redington, 1929), so reference will only be made to such work when it has a direct, positive, or negative bearing on the results recorded here.

HARVEST INDEX AS A SELECTION CRITERION FOR GRAIN YIELD IN TWO SPRING WHEAT CROSSES GROWN AT TWO POPULATION DENSITIES

1980 ◽  
Vol 60 (4) ◽  
pp. 1141-1146 ◽  
Author(s):  
H. G. NASS
Keyword(s):  
Population Density ◽  
Grain Yield ◽  
Spring Wheat ◽  
Harvest Index ◽  
Plant Density ◽  
Selection Criterion ◽  
Triticum Aestivum L ◽  
Wheat Breeding ◽  
Seeding Rate ◽  
Population Densities

The use of harvest index as a selection criterion for grain yield in F2 populations of spring wheat (Triticum aestivum L.) grown at two population densities was investigated. Harvest index was useful in delineating yield differences between lines for both crosses. The F4 lines selected in F2 for a high harvest index yielded about 9% more per plot in 1978 than F4 lines having a low harvest index in F2. Generally, lines selected at the higher commercial seeding rate yielded more than lines selected at the lower plant density. In 1979, a heavy Fusarium infection reduced the mean grain yield of the F6 lines and suppressed any significant response to selection resulting from population density and harvest index in F2. While selection based on high harvest index at low population density can be used to select higher yielding plants it was not as effective as selection at high population density which more closely approximates commercial crop densities. Additional research is needed before the use of harvest index as a selection tool in wheat breeding programs can be recommended for use in Atlantic Canada.

Response of flax and lentil to seeding rates, depths and spring application of dinitroanaline herbicides

1994 ◽  
Vol 74 (4) ◽  
pp. 875-882 ◽  
Author(s):  
D. A. Wall
Keyword(s):  
Population Density ◽  
Seed Yield ◽  
Linum Usitatissimum ◽  
Field Studies ◽  
Test Weight ◽  
Seeding Rate ◽  
Population Densities ◽  
Herbicide Treatment ◽  
Herbicide Treatments ◽  
One Year

Two field studies were conducted at Morden, Manitoba in 1992 and 1993 to investigate the effect of seeding depth and seeding rate on flax and lentil recovery following spring application of dinitroanaline herbicides. In the first study, the effect of seeding depth on flax and lentil tolerance to ethalfluralin, pendimethalin and trifluralin, applied preplant soil incorporated at 1.1 kg a.i. ha−1 in the spring, was investigated. Deep seeding (6 cm) reduced flax population density by 59%, averaged over 2 yr, when compared with shallow seeding (3 cm). Ethalfluralin, pendimethalin and trifluralin, reduced flax population density, but the effect of herbicide was less when flax was seeded shallow. Trifluralin and ethalfluralin reduced flax yield more when the crop was seeded deep than when seeded shallow. Herbicide treatments had no effect on flax yield when the crop was seeded shallow. Ethalfluralin and trifluralin reduced lentil population density and seed yield in one year only. Pendimethalin did not reduce lentil population density or seed yield. Deep seeding did not affect lentil population density, seed yield or phytotoxicity of dinitroanalines in this crop. In a second study, flax and lentil were seeded at 15, 30, 45, 60 and 90 kg ha−1 at 3 and 6 cm planting depths to assess the effect of seeding depth and seeding rate on crop recovery following spring application of ethalfluralin. In ethalfluralin treated plots, seeding rate had to be increased from 60 to > 90 kg ha−1 to achieve similar population densities as 45 kg ha−1 in untreated plots. Flax yields were unaffected by ethalfluralin when the crop was seeded shallow, but yields were reduced significantly when the crop was seeded deep. Lentil population density increased linearly with seeding rate. Lentil population density was unaffected by seeding depth or herbicide treatment. Ethalfluralin did not reduce lentil yield in either year. Lentil yields increased with seeding rate up to 30 kg ha−1, with little further increase in yield for seeding rates between 30 and 90 kg ha−1. Key words:Lens culinaris, Linum usitatissimum, population density, seeding depth, seeding rate, yield, seed test weight, ethalfluralin, pendimethalin, trifluralin

scholarly journals Peduncle and fruit yield, in six cropping seasons, of early dwarf cashew tree clones irrigated with different water regimes

2004 ◽  
Vol 26 (3) ◽  
pp. 474-477 ◽  
Author(s):  
Kathia Maria Barbosa e Silva ◽  
Francisco Aécio Guedes Almeida ◽  
Paulo Sérgio Lima e Silva
Keyword(s):  
Growth And Development ◽  
Water Regime ◽  
Block Design ◽  
Fruit Yield ◽  
Plant Growth And Development ◽  
Clonal Population ◽  
Random Block ◽  
Random Block Design ◽  
Cropping Seasons ◽  
Cashew Tree

The objective of this work was to evaluate peduncle and fruit yield in clone MS 076 and in a clonal population of drip-irrigated, early dwarf cashew trees propagated by layering, in six cropping seasons. In order to meet the increased water requirements of the crop resulting from plant growth and development, irrigation during the dry season was performed daily according to the following water regime: 15 min/plant/day during the 1st year, 30 min/plant/day during the 2nd year, 45 min/plant/day during the 3rd year and 60 min/plant/day during all subsequent years. Water was supplied by one drip emitter/plant, at an (adjustable) flow rate of 36 L/h.The research was carried out in Fortaleza-Ceará, Brazil, and a random block design was utilized, with five replicates and split-plots. The clones were assigned to plots and the cropping seasons were considered as subplots. The clonal population was superior to the clone only with regard to number of nut shells (NNS), and solely in the first season. The clone was superior to the population as to NNS and peduncle yield (PY) in the second season, and also with regard to the three evaluated traits - NNS, PY, and nut shell yield, in the last three cropping seasons.

scholarly journals Assessment of Flatfoot Index and Prevalence of Musculoskeletal Disorders of the Foot in Young Athletes: Swimming, Rowing and Weightlifting

2020 ◽  
Vol 6 (2) ◽  
pp. 58-63
Author(s):  
Israel Miguel Andrés ◽  
Milagros Pons Portugal ◽  
José De Jesús Mayagoitia Vázquez ◽  
Elias Gabriel Carrum Siller ◽  
Ma. Eugenia Pérez Rodríguez
Keyword(s):  
Musculoskeletal Disorders ◽  
Average Height ◽  
Young Athletes ◽  
Average Mass ◽  
Prevalence Level ◽  
High Prevalence ◽  
Cavus Foot ◽  
Soles Of The Feet ◽  
The Right ◽  
Low Prevalence

Objectives: The objective of this work was to analyze the morphology of the soles of the feet in young athletes to find the prevalence of these pathologies through the Chippaux-Smirak index. Material and Methods: Seventy-five athletes between nine and twenty years old participated in the study (56% female and 44% male), the average mass was 62.92 ± 13.46kg and the average height was 1.67 ± 0.11m. The sports considered in the study were weightlifting, swimming, and rowing. Results: The results clearly show that flatfeet in adolescents and young adults is a condition with a low prevalence level, 10.7% and 12% for the right and left foot, respectively. One of the most outstanding results found in the study is the high prevalence of cavus foot, where women are the most affected by this pathology. Furthermore, swimming presented the highest prevalence of cavus foot, 42.1% and 52.6% for the right and left foot, respectively. Conclusion:  In conclusion, the understanding of the morphology of the soles of the feet can help to determine the foot type in these three different sports, and therefore, it can be implemented physiotherapeutic treatments or orthotics devices for overcome the musculoskeletal disorders and prevent future injures.

scholarly journals Interactions between Magnaporthiopsis maydis and Macrophomina phaseolina, the Causes of Wilt Diseases in Maize and Cotton

2020 ◽  
Vol 8 (2) ◽  
pp. 249 ◽  
Author(s):  
Ofir Degani ◽  
Shlomit Dor ◽  
Dekel Abraham ◽  
Roni Cohen
Keyword(s):  
Fungal Pathogens ◽  
Water Regime ◽  
Growth Parameters ◽  
Harmful Effect ◽  
Soil Fungus ◽  
Macrophomina Phaseolina ◽  
Maturity Stage ◽  
Double Infection ◽  
Yield Production ◽  
Series Of Experiments

Fungal pathogens are a significant threat to crops worldwide. The soil fungus, Magnaporthiopsis maydis, severely affects sensitive maize hybrids by causing the rapid wilting of plants at the maturity stage. Similarly, the soil fungus, Macrophomina phaseolina, develops in a variety of host plants, which leads to rot and plant mortality. The presence of both pathogens together in diseased cotton plants in Israel suggests possible interactions between them. Here, these relationships were tested in a series of experiments accompanied by real-time PCR tracking in maize and cotton. Despite the fact that neither of the pathogens was superior in a growth plate confrontation assay, their co-inoculum had a significant influence under field conditions. In maize sprouts and fully matured plants, infection by both pathogens (compared to inoculation with each of them alone) led to lesser amounts of M. maydis DNA but to increased amounts of M. phaseolina DNA levels. These results were obtained under a restricted water regime, while optimal water irrigation led to less pronounced differences. In water-stressed cotton sprouts, infection with both pathogens led to an increase in DNA amounts of each of the pathogens. Whereas the M. maydis DNA levels in the double infection remain high at the end of the season, a reduction in the amount of M. phaseolina DNA was observed. The double infection caused an increase in growth parameters in maize and cotton and decreased levels of dehydration in maize plants accompanied by an increase in yield production. Dehydration symptoms were minor in cotton under an optimal water supply. However, under a restricted water regime, the double infection abolished the harmful effect of M. phaseolina on the plants’ development and yield. These findings are the first report of interactions between these two pathogens in maize and cotton, and they encourage expanding the study to additional plant hosts and examining the potential involvement of other pathogens.

Features of impulse sprinkling technology

2016 ◽  
Vol 16 (5) ◽  
pp. 1178-1184
Author(s):  
Ye. V. Angold ◽  
V. A. Zharkov ◽  
A. A. Kalashnikov ◽  
N. N. Balgabayev
Keyword(s):  
High Temperature ◽  
Drip Irrigation ◽  
Growth And Development ◽  
Water Regime ◽  
Soil Layer ◽  
Vegetation Period ◽  
Air Humidity ◽  
Plant Environment ◽  
Applied Technology ◽  
The Given

The principle of non-stop water supply to plants and soil in accordance with their water intake is progressive. Drip irrigation and impulse sprinkling correspond to this principle. Drip irrigation provides optimal water and nutrient regimes directly to the root system of plants. However, this irrigation is not effective enough under conditions of high temperature (over 25–35 °C) as growth processes are known to slow down and photosynthesis to cease, consequently affecting the yielding capacity. Impulse sprinkling provides optimal moisture level in the given layer, improved microclimate in the plant environment and water regime of plants within the whole vegetation period and is most effective within daytime. Through improvement of microclimate and plants' water regime within periods of high temperature and low air humidity under the conditions of South Kazakhstan, the technology of impulse sprinkling enabled increasing productivity of a clonal rootstock mother plantation for the 3 years of research on average by 19.4% compared to regular sprinkling. The applied technology provided optimization of layers' growth and development conditions upon decrease of the moistening of the soil layer of mother plantation bushes for derogation of their water regime after hilling the grown root layers.

Effects of population density and temperature on the growth and development of Amata sp

2011 ◽  
Vol 19 (3) ◽  
pp. 688-691
Author(s):  
Ming ZHAO ◽  
Ping WANG ◽  
Fu-Cai ZHOU ◽  
Ai-Xiang GU ◽  
Jia REN ◽  
...  
Keyword(s):  
Population Density ◽  
Growth And Development
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