scholarly journals Incidence of nodal rooting and plantlet survival in spreading red clovers

1996 ◽  
pp. 243-246
Author(s):  
M.G. Hyslop ◽  
P.D. Kemp ◽  
D.J. Barker ◽  
J. Hodgson
Keyword(s):  
Field Experiments ◽  
Trifolium Pratense ◽  
Plant Density ◽  
Block Design ◽  
Red Clover ◽  
Hill Country ◽  
Life And Death ◽  
Grazing Systems ◽  
Second Year ◽  
Survival Experiment

Red clover (Trifoolium pratense L.) can provide high quality summer feed but has declined in popularity owing to its poor persistency in temperate grazing systems. From 1991 to 1996 the incidence of nodal rooting of prostrate selections of red clover was quantified and the survival of the resulting plantlets was tracked over time, under grazing conditions. Three field experiments were conducted using Astred, Grasslands Pawera, F2419 and Grasslands Turoa selections of red clover. The main experiment comprised 3 harvests (plants and plantlets dug up) of 3 red clover selections, in a randomised complete block design with no grazing. The subsidiary plantlet survival experiment followed the life and death of 160 plantlets from the three selections under rotational grazing to 5 cm, over a period of 48 weeks. The numbers of plantlets produced per parent plant of each selection were 37, 16 and 5 for Astred, F2419 and Turoa, respectively (P~O.001). Astred produced significantly larger plantlets (PcO.001, mean = 130.6 g/ DM/plantlet) over 7 months than F2419 and Turoa -(means-=.31.5.and.lO~g/DM/plantlet,.r.espec~y)~ At week 48 plantlet survival ranged from 84% (Astred) to 27% (Turoa) (P~O.001). The experiment at Ballantrae consisted of oversowing 20 kg/ha of 2 clover selections (Pawera, creeping selection) into sprayed pasture in 1991. Plant density, pasture composition and herbage accumulation were measured until 1995, with all treatments continuously stocked at 16 ewes/ha. Pawera contributed only 1.1% to herbage accumulation during the second year when oversown on hill country and ~-disappeared from the sward-soon-after.XIn-averagei the creeping selection made up 3.2% of the total sward herbage accumulation from years 2 to 5. It was concluded that the spreading red clovers represented by Astred and F2419 selections have the potential to be more persistent than crown red clovers under grazing. Keywords: nodal rooting, plantlet, spreading red clover, Trifolium pratense

AN ASSESSMENT OF THE SOIL ACIDITY PROBLEM IN ALBERTA AND NORTHEASTERN BRITISH COLUMBIA

1977 ◽  
Vol 57 (2) ◽  
pp. 157-164 ◽  
Author(s):  
D. C. PENNEY ◽  
M. NYBORG ◽  
P. B. HOYT ◽  
W. A. RICE ◽  
B. SIEMENS ◽  
...  
Keyword(s):  
British Columbia ◽  
Soil Ph ◽  
Soil Acidity ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Acid Soils ◽  
Red Clover ◽  
Hordeum Vulgare L ◽  
Crop Species

The amount of cultivated acid soil in Alberta and northeastern British Columbia was estimated from pH values of farm samples analyzed by the Alberta Soil Testing Laboratory, and the effect of soil acidity on crops was assessed from field experiments on 28 typical acid soils. The field experiments consisted of two cultivars of barley (Hordeum vulgare L.) and one cultivar each of rapeseed (Brassica campestris L.), red clover (Trifolium pratense L.) and alfalfa (Medicago sativa L.) grown with and without lime for 2 yr. There are about 30,000 ha of soils with a pH of 5.0 or less where soil acidity seriously restricts yields of all four crop species. There are approximately 300,000 ha with a soil pH of 5.1–5.5 where liming will on the average increase yields of alfalfa by 100%, yields of barley by 10–15%, and yields of rapeseed and red clover by 5–10%. There are a further 1,600,000 ha where soil pH ranges from 5.6 to 6.0 and liming will increase yields of alfalfa by approximately 50% and yields of barley, rapeseed and red clover by at least 4–5%.

scholarly journals Limestone and phosphorus application and forage production in natural pastures with sodseeding of cool-season species

2017 ◽  
Vol 38 (6) ◽  
pp. 3681 ◽  
Author(s):  
Nelson Eduardo Prestes ◽  
Cassandro Vidal Talamini do Amarante ◽  
Cassiano Eduardo Pinto ◽  
Gabriel Avila Prestes ◽  
Guilherme Doneda Zanini ◽  
...  
Keyword(s):  
Linear Growth ◽  
Block Design ◽  
Red Clover ◽  
Triple Superphosphate ◽  
Forage Production ◽  
Cool Season ◽  
Natural Pasture ◽  
Randomized Block Design ◽  
Second Year ◽  
Phosphorus Application

Natural pastures are important ecosystems that both contribute to biodiversity conservation and provide an important source of income, especially for cattle ranchers. While these pastures yield fairly low productivity, they can be improved by increasing soil fertility and introducing species with high productive potentials. In this sense, the purpose of this study was to evaluate the effects of applying limestone and phosphorus, as well as introducing cool-season species with a mixture of species dominated by Schizachyrium tenerum Nees, into a natural pasture in the Catarinense Plateau. The experiment was conducted from January 2010 to December 2013; the treatments consisted of superficial distribution of limestone in proportions of 3.6, 7.2, 11.0, and 14.4 t ha-1, as well as distribution of phosphorus in the form of triple superphosphate in proportions of 35, 70, 105, and 140 kg of P2O5 ha-1. In addition, cool-season species were overseeded. The experiment consisted of a randomized block design with subdivided plots and three replications. Limestone was applied to the main parcel, whereas phosphorus was applied to the subplots. There was no interaction between the levels of limestone and phosphorus. The application of 11.0 t ha-1 of limestone yielded the highest forage production, with 3,932.2 kg of dry matter (DM) ha-1 during the second year. Red clover was the species that best reacted to the additions, with levels of 7.2 and 11.0 t ha-1 over the 4 years. In addition, phosphorus provoked a positive response throughout the experiment. The highest forage production was observed during the second year, with an addition of 140 kg P2O5 ha-1 (4,419.4 kg DM ha-1). Only one-eighth of the recommended amount of limestone (3.6 t ha-1) allowed for the establishment and persistence of the legumes introduced into natural pastures. These additions, associated with increasing levels of phosphorus, yielded linear growth in the production of forage in natural pastures with a mixture of species dominated by Schizachyrium tenerum Nees.

scholarly journals Variability of red clover genotypes on the basis of morphological markers

Genetika ◽  
2018 ◽  
Vol 50 (3) ◽  
pp. 895-906
Author(s):  
Irena Radinovic ◽  
Sanja Vasiljevic ◽  
Miroslav Zoric ◽  
Gordana Brankovic ◽  
Tomislav Zivanovic ◽  
...  
Keyword(s):  
Trifolium Pratense ◽  
Diversity Index ◽  
Dimensional Space ◽  
Block Design ◽  
Morphological Variability ◽  
Red Clover ◽  
Genetic Distances ◽  
Morphological Markers ◽  
Homogeneous Groups ◽  
Average Value

Red clover (Trifolium pratense L.) is an important forage legume of temperate regions dominantly used as a source of animal food. The present research aimed at assessment of genetic diversity based on morphological markers, through the analyses of five morphological markers in a collection of 46 red clover genotypes. These morphological markers were screened according to the UPOV descriptor (2001) in the trial laid out in a randomized complete block design with three replications. The traits analyzed and investigated were: time of flowering, growth habit, density of hairs, leaf color and intensity of white marks. The average value of Shannon's diversity index for five morphological markers amounted 0.711. Homogeneity analysis (HOMALS) of the same five descriptors accounted for 71.2% of the total variation of the standardized data, with the first and second axis explaining 38.4% and 32.8% of the morphological variability, respectively. Based on this analyses all red clover genotypes were grouped into seven homogeneous groups in two-dimensional space, thus providing visualization of genotypes diversity based on their morphological traits. UPGMA cluster analysis of the same morphological markers allowed the description of four groups with genetic distances represented by the simple matching coefficient of similarity ranging from 0.00 to 1.00. Observed results achieved by these two analyses were compared and although both of analyses were successful in grouping and discrimination of red clover genotypes with some similarities and differences, priority in future breeding programs was given to the HOMALS.

scholarly journals Response of the common bean to liquid fertilizer and Rhizobium tropici inoculation

2020 ◽  
Vol 41 (6supl2) ◽  
pp. 2967-2976
Author(s):  
José Geraldo da Silva ◽  
◽  
Enderson Petrônio de Brito Ferreira ◽  
Virgínia Damin ◽  
Adriano Stephan Nascente ◽  
...  
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Field Experiments ◽  
Plant Density ◽  
Block Design ◽  
Rhizobium Tropici ◽  
Seed Inoculation ◽  
The Common ◽  
Application Depth ◽  
Liquid Fertilization

The common bean production system is majorly based on the use of granular fertilizers to provide nutrients for the crop. Studies on the use of liquid fertilization at an appropriated depth and, seed inoculation with Rhizobium tropici can provide significant increases in the grain yield of the common bean. The objective of this study was to determine the growth and productivity of common bean as affected by N-P formulations, application depths and the inoculation with R. tropici. Field experiments were carried out in 2015 and 2016 cropping years using a complete block design, in a 2x2x2 factorial arrangement, with four replicates. The treatments involved the combination of N-P formulation (granular and liquid), two application depths of the N-P formulation (6 and 12 cm) and with or without rhizobia inoculant. The plant density (PD), number of pods (NP), number of grains (NG), mass of 100 grains (M100) and grain yield (GY) were determined. The granular and liquid N-P formulations provided similar results for PD, NP, NG, and GY of common bean. Similarly, the application depth of the N-P formulations did not affect GY. Inoculation of the seed with R. tropici stimulated NP and NG, increasing GY. Growth and productivity parameters were equally affected by the type of formulation and application depth; however, GY was greater with rhizobial inoculant. Thus, the liquid N-P formulation, applied at 6 cm depth, associated with rhizobial inoculant can improve the crop management providing better control of application uniformity, minimal soil mobilization, less fuel consumption, and increased grain yield.

scholarly journals Optimization of High Density Planting with Drip Irrigation in Rabi Onion

2019 ◽  
pp. 1-6
Author(s):  
M. D. Ojha ◽  
Vijay Kumar ◽  
R. B. Verma ◽  
M. Pal ◽  
S. R. P. Singh ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Field Experiments ◽  
Plant Density ◽  
Block Design ◽  
Irrigation Scheduling ◽  
High Density ◽  
Limiting Factor ◽  
Plant Spacing ◽  
Irrigation Interval ◽  
Bulb Yield

Irrigation scheduling is necessary for increasing onion production in an Agro-climatic zone III A and B of Bihar, where water is becoming scarce gradually and a limiting factor for onion production. Field experiments were conducted during the Rabi season of 2013-14 and 2014-15 at the experimental farm, Nalanda College of Horticulture, Noorsarai, Nalanda. The objectives were to standardize high density planting with drip irrigation and to study the yield performance and storability on onion in Nalanda region. The treatments consisted of factorial combination of three irrigation intervals (2, 4 and 6 days) and four population densities (2000000, 1333333,  1000000 and 666666 plants/ha) corresponding to 10 x 5, 10 x 7.5, 10 x 10 and 15 x 10 cm respectively. The experiments were laid out in randomized block design replicated three times. Results revealed that the highest marketable yield was significantly favoured by 2 days interval followed by 4 days. However, lower plant spacing 10 x 5 cm recorded higher plant height, minimum maturity days, grass and marketable bulb yield were significantly higher with plant spacing 10 x10 cm followed by 15 x10 cm. The marketable bulb yield was significantly higher with interaction of T7 (10 x10 cm with 2 days irrigation interval) 1000000 plant density and 2 days irrigation interval than other treatment combinations. From the results of the study, it can be concluded that 2 days interval irrigation with a plant density of 1000000 (10x10 cm) plants per hectare can be practised for maximum onion bulb yield.

scholarly journals Integrated Effect of Plant Density, N Rates and Irrigation Regimes on the Biomass Production, N Content, PAR Use Efficiencies and Water Productivity of Rice Under Irrigated Semiarid Environment

2012 ◽  
Vol 40 (1) ◽  
pp. 201 ◽  
Author(s):  
Shakeel AHMAD ◽  
Mirza HASANUZZAMAN
Keyword(s):  
Grain Yield ◽  
Management Practices ◽  
Field Experiments ◽  
Plant Density ◽  
Block Design ◽  
Water Productivity ◽  
Research Area ◽  
Semiarid Environment ◽  
Irrigation Regimes ◽  
Plant Densities

Two field experiments were conducted for two years (2000 and 2001) at Agronomic Research Area, University of Agriculture Faisalabad (UAF), Pakistan. There were 15 treatment combinations for experiment-I having three plant densities, viz., one seedling hill-1 (PD1), two seedlings hill-1 (PD2) and three seedlings hill-1 (PD3) and five nitrogen rates, viz., 0, (N0); 50, (N50); 100, (N100); 150, (N150); and 200 (N200) kg N ha-1. Experiment-II also included 15 treatments having three plant densities, viz., one seedling hill-1 (PD1), two seedlings hill-1 (PD2) and three seedlings hill-1 (PD3) and five irrigation regimes, viz., 62.5 cm (I1), 77.5 cm (I2), 92.5 cm (I3), 107.5 cm (I4), and 122.5 cm (I5). A randomized complete block design (RCBD) was employed with three repetitions. The results for experiment-I revealed that the highest biomass (1438 g m-2), grain yield (497 g m-2), crop growth rate (15.36 g m-2 d-1), net assimilation rate (4.24 g m-2 d-1) were observed in the treatment having combination of two seedlings hill-1 and 200 kg N ha-1 (PD2N200). The agronomic and economic nitrogen and PAR use efficiencies were also higher in this treatment. In case of experiment-II, the highest biomass and grain yield were obtained in case of treatment having combination of two seedlings hill-1 and 107.5 cm irrigation regime (PD2I107.5). The irrigation application based water productivity ranged from 0.36 kg mm-3 to 0.61 kg mm-1, irrigation plus precipitation based water productivity ranged from 0.32 kg mm-3 to 0.55 kg mm-3 and evapotranspiration based water productivity ranged from 0.65 kg mm-3 to 0.84 kg mm-3 among 15 treatments combination of plant density and irrigation regimes. This study concludes that for increasing the benefits for the resource-poor growers, the integration of crop management practices is an optimum strategy to substantially increase the resources use efficiency under irrigated semiarid environment.

Plant density in red clover (Trifolium pratense L.) pastures as an early predictor of forage production

2018 ◽  
Vol 101 ◽  
pp. 193-199
Author(s):  
Rodrigo Zarza ◽  
Mónica Rebuffo ◽  
Alejandro La Manna ◽  
Mónica Balzarini
Keyword(s):  
Trifolium Pratense ◽  
Plant Density ◽  
Red Clover ◽  
Forage Production ◽  
Trifolium Pratense L ◽  
Early Predictor

Legume cover crops with winter cereals in southern Manitoba: Fertilizer replacement values for oat

2005 ◽  
Vol 85 (3) ◽  
pp. 645-648 ◽  
Author(s):  
J. R. Thiessen Martens ◽  
M. H. Entz ◽  
J. W. Hoeppner
Keyword(s):  
Cover Crops ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Sandy Loam ◽  
Red Clover ◽  
Canadian Prairies ◽  
Winter Cereals ◽  
Crop Field ◽  
Legume Cover Crops ◽  
Trifolium Pratense L

Yield benefits of legume cover crops in winter/spring cereal systems have not been well documented in the Canadian prairies. The objective of this study was to evaluate the fertilizer replacement values (FRV) of relay-cropped alfalfa (Medicago sativa L.) and red clover (Trifolium pratense L.) and double-cropped chickling vetch (Lathryus sativus L.) and black lentil (Lens culinaris Medik. subsp. culinaris) to a subsequent oat (Avena sativa L.) crop. Field experiments were conducted in Manitoba on a clay soil at Winnipeg and a sandy loam at Carman. Alfalfa provided the highest FRV at Winnipeg (51–62 kg N ha-1), followed by chickling vetch (29–43 kg N ha-1), lentil (23–39 kg N ha-1), and red clover (24–26 kg N ha-1). FRV could not be established at Carman, where course-textured soil and low rainfall limited legume growth. Key words: Relay cropping, double cropping, cover crops

scholarly journals Boron application in red clover (Trifolium pratense L.) seed production

2015 ◽  
Vol 54 (1) ◽  
pp. 59-63 ◽  
Author(s):  
Dalibor Tomić ◽  
Vladeta Stevović ◽  
Dragan Đurović ◽  
Milomirka Madić ◽  
Nikola Bokan ◽  
...  
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Red Clover ◽  
Relative Increase ◽  
Second Growth ◽  
Trifolium Pratense L ◽  
Second Year ◽  
Positive Effect

AbstractA field trial with four red clover cultivars was established on acid soil in order to evaluate the effect of foliar boron application on seed yield. The crop received foliar boron treatment during the second growth of the second year at two applications. Although seed yield showed a significant increase in boron-treated plants in 2011 compared with control (26.0%), its relative increase was far higher in 2010 (43.2%), which had increased total rainfall amounts during flowering. Sufficient level of boron supply to red clover plants for seed production has a remarkably positive effect under conditions hampering pollination and fertilisation.

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