Studies in fertility and inbreeding in some herbage grasses

  • 162 Pages
  • 0.92 MB
  • English
Berlingska Boktryckeriet , Lund
Grasses., Plant breeding., Fertilization of pl
Statementby Fredrik Nilsson.
LC ClassificationsSB197 .N5 1933
The Physical Object
Pagination1 p. l., 162 p.
ID Numbers
Open LibraryOL6311224M
LC Control Number34030641

Download Citation | On Mar 1,FREDRIK NILSSON published Studies in fertility and inbreeding in some herbage grasses | Find, read and cite all the research you need on ResearchGate.

This paper deals with the problems and difficulties encountered in breeding typically cross fertilized herbage plants and the methods adopted to solve them. The degree of self fertility and degeneration following inbreeding and the variation within the different species in regard to these phenomena have been extensively studied, and the results so far attained ware here set out in some by: 5.

In the current study, mixtures with alfalfa had consistently higher herbage mass than grass monocultures. Previous research agrees, noting that grass–legume mixtures had greater herbage mass compared with grass monocultures even when supplemental N fertilization was added to the grass monocultures (Berdahl, Karn, & Hendrickson, ).Author: Michelle L.

DeBoer, Amanda M. Grev, Craig C. Sheaffer, M. Scott Wells, Krishona L. Martinson. Farmers require compact calving; therefore, animals with delayed first calving or a longer calving interval have a greater risk of involuntary culling. Nonetheless, this is the first study to investigate the effect of inbreeding on fertility and survival in seasonally calving grass-based systems of Cited by: STUDIES ON THE ROOT DEVELOPMENT OF HERBAGE PLANTS STUDIES ON THE ROOT DEVELOPMENT OF HERBAGE PLANTS Williams, T.

E.; Baker, H. Various methods of root sampling are reviewed and discussed in relation to the type of information required. The root sampling techniques at the Grassland Research Institute are described and examples of. dominant self-fertility allele (Sf) at the S locus was used to inbreed white clover to near-homozygosity (F=).

Inbreeding depression was higher in the glasshouse experiment than was observed under sheep grazing in the field. It was also higher for comparable generations with a 54% reduction in herbage yield of the S1 generation in.

Rath's 83 research works with 3, citations and 6, reads, including: Effect of milking frequency in early lactation on energy metabolism, milk production and reproductive performance of.

The objectives of this study were to learn and prove the truth and scientific miracles of The Quran, specifically the prohibition of incest for humans, also applies and affects especially on the growth and yieldin particularly open pollinated plants such as maize through the process of inbreeding depression.

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Grasses-a guide to their structure, identification, uses, and distribution in the British Isles. Penguin Books, Baltimore, xii + pages. Google Scholar Interspecific and intergeneric hybrids in herbage grasses. XVIII. Studies in fertility and inbreeding in some herbage grasses.

The genetic and molecular basis of heterosis has long been studied but without a consensus about mechanism. The opposite effect, inbreeding depression, results from repeated self-pollination and leads to a reduction in vigor.

A popular explanation for this reaction is the homozygosis of recessive, slightly deleterious alleles upon inbreeding. However, extensive studies in alfalfa indicated. In a study to investigate the performance of a range of perennial grasses in southern Australia (Nie et al., ), rooting depth of 11 temperate perennial grasses and one cultivar of kikuyu grass (Pennisetum clandestinum cv.

Whittet) was measured at two sites (Hamilton and Warrak in western Victoria, Australia) contrasting in rainfall, soil. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Magnesian limestone in the 1st year increased Mg in grass and white clover by about 10%, in red by 19%, and in the 2nd year in white by 34, in red by 27, in grass by 16 and 13%. Carboniferous limestone depressed Mg negligibly in all species by 3 to 5%.

Total Mg of mixed herbage herbage Subject Category: Miscellaneous. A grazing trial was conducted on 99 ha of moist, low-fertility hill country near Woodville, New Zealand, during Treatments were: low fertiliser ( kg/ha/a superphosphate (9% P, 10% S)) and high fertiliser (average kg/ha/a superphosphate, plus lime) application rates; and 3 grazing managements — rotational grazing by sheep and by cattle, and set stocking by sheep.

Pollen fertility for the diploids ranged from 0 to per cent and that for the triploids less than 1 per cent to per cent. In the triploid with two interchanges, it was the highest, being per cent.

Grasslands comprise more than a quarter of the Earth's land surface. In addition to supporting a wide range of vertebrates such as domestic livestock and a variety of games species, grassland is the natural habitat for a wide range of invertebrate species, and this book considers those which occur in grassland and their impact on soil fertility and herbage growth.

Nine samples of range herbage species were collected within the grazing season using × m quadrate as from three weeks initial pasture growth established in June across throughout up to December (two seasons), to examine the effects of age on the trend of some chemical compositions and energy changes.

Analysis of variance indicated that the chemical composition of grassland from 3. Deborah Ardolf, ND Infertility patients usually present to us in a very desperate and near-hopeless position. According to the Centers for Disease Control & Prevention (CDC) statistics, million women have sought out help from various infertility services.

Case Study My year-old female patient was no different. She and her husband had been trying [ ]. tance of fertility and vitality has been recognised and ^>preciated, but they have received little detailed and quantitative strxdy.

There is a need for aore inforniation on their behavior under different breeding systeas. The purpose of this investigation was as follows: 1, To study the effect of inbreeding on fertility.

It is a multipurpose forage crop, primarily used to feed cattle in cut and carry feeding systems. Characterization and diversity studies on a small collection of Napier grasses have identified a moderate level of genetic variation and highlighted the availability of some good agronomic traits, particularly high biomass production, as a forage crop.

The current status of herbage grass breeding is considered in relation to the utilization of first-generation hybrid vigour. A breeding scheme is outlined by which it is suggested that interpopulational F 1 hybrid varieties could be developed to provide a simple and effective means of exploiting heterotic potential in herbage grass species.

A survey of interpopulational F 1 heterosis expressed.

Description Studies in fertility and inbreeding in some herbage grasses FB2

Some grass species adapted to growing in low-fertility environments have increased capacities for root respiration and nutrient absorption rates.

These species can maintain root growth, respiration, and nutrient absorption for 48 hours following 1 severe defoliation, but 2 or more successive defoliations reduce root growth (Chapin and Slack.

Studies have shown that increasing herbage allowance from 16 to 24 kg grass dry matter (DM) in mid-lactation significantly increased both the yields and concentrations of total protein (e.g., from to %, w/w), casein (–%, w/w), and lactose (–%, w/w) but did not significantly affect the concentrations of calcium and phosphorus, rennet gelation properties, and the alcohol stability of the.

Cattle and sheep grazing effects on soil organisms, fertility and compaction in a smooth-stalked meadowgrass-dominant white clover sward.

Grass and Forage Science, Vol. 50, Issue. 3, p. Grass and Forage Science, Vol. 50, Issue. 3, p. Some results have suggested the possibility of increasing herbage production in shaded conditions through the use of moderate doses of fertilizers (PANDEY et al., ).

The objective of this study was to evaluate the effect of three light regimes and two fertilization levels on the morphogenesis, structure and herbage accumulation of signalgrass.

A previous AFBI study by Cushnahan and Mayne () provided some insight to this, and demonstrated that fresh grass and silage from the same sward could have similar nutritive value when offered to dairy cows. However, this study involved herbage of a much lower digestibility than typically used while zero grazing.

Dairy farmer resources, news and events information from the industry good organisation DairyNZ, representing New Zealand dairy farmers. Grasslands comprise more than a quarter of the Earth's land surface.

In addition to supporting a wide range of vertebrates such as domestic livestock and a variety of games species, grassland is the natural habitat for a wide range of invertebrate species, and this book considers those which occur in grassland and their impact on soil fertility and herbage growth.1/5(1).

Discover the best Fertility in Best Sellers. Find the top most popular items in Amazon Books Best Sellers. A study of the nature and origins of Christianity within the fertility cults of the ancient Near East A Children's Book About Scientific Education Jimmy Nightingale.

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Details Studies in fertility and inbreeding in some herbage grasses EPUB

Paperback. Fertility and adult survival rates of cattle in the Chillingham herd, with asymptotic natural rate of population increase λ, according to the phase of the study. Fertility is defined as ratio of number of calves born per adult female (at least 3 years old on January 1), averaged across the phase.

rainfall distribution on oven-dry herbage production and nutrient content of native range grasses, Kitt Peak, and Date of application Herbage Protein (lb/A) (%) Rainfall between (2) treatments (in.) Harvested Septem June 1, abl a - July 3, b a Herbage production of a range of grass species and cultivars, Grass and Forage Science, /jtbx, 47, 1, (), ().

Wiley Online Library Effect of N Application Level on Herbage Yield and Quality in Kentucky Bluegrass Pastures for Turf of School Ground, Journal of The Korean Society of Grassland and Forage.Some of the points regarding these elements and their balance will now be examined in greater detail.

Figure Relationship between the magnesium content of the herbage, the magnesium content of the blood serum of the cow and the incidence of tetany There is no correlation between the magnesium content of the herbage and that of the blood serum of the animal.