Download or read book Stem shortenin Experiments on red clover with growth regulators written by Otto Valle and published by . This book was released on 1966 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stem shortening Experiments on Red Clover with Growth Regulators written by Otto Valle and published by . This book was released on 1965 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selostus: Kokeita puna-apilan varren lyhentämiseksi kasvua säätelevillä aineilla.
Download or read book Sten shortening Experiments on Red Clover with Growth Regulators written by Otto Valle and published by . This book was released on 1966 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Plant Growth Regulator and Irrigation on Physiological and Harvest Maturity of Red Clover in Relation to Seed Quality written by Duangporn Angsumalee and published by . This book was released on 2016 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red clover (Trifolium pratense L.) seed yield can be affected by plant growth regulators (PGR) and irrigation; however, the effects of these factors on physiological maturity (PM), harvest maturity (HM), and seed quality are unknown. The objectives of this study were to: 1) determine how irrigation and trinexapac-ethyl (TE, a PGR) affect PM, HM, seed viability, and seed vigor of red clover at different stages of maturity, 2) evaluate the effect of irrigation, TE and their interaction on seed yield, its components, and the quality of red clover seeds at harvest, 3) investigate changes in gibberellic and abscisic acid contents in red clover during seed development and maturation, and 4) determine the potential of red clover seed storability under different storage conditions over two years. A field study was conducted over a two-year period at Hyslop Research Farm, Corvallis, Oregon. A single irrigation was applied at first flowering stage (BBCH 55). Five rates of TE, ranging from 0 to 700 g a.i. ha−1, were applied at stem elongation and bud emergence stages (BBCH 32 and BBCH 51, respectively). Seed viability and vigor tests were conducted at Oregon State University Seed Laboratory to measure the effects of treatments on seed quality. Irrigation delayed PM by four days compared to the non-irrigated treatment. The TE applications did not alter seed maturation. At PM, the flower heads contained light brown petals with brownish-green sepals and seeds were pale green to pale yellow. Heads at HM contained dark brown petals and sepals, whereas seeds turned to yellow or yellow-dark grayish purple. Seed dry weight did not change significantly from PM to HM. Seed moisture content at maximum seed dry weight (PM) ranged from 340 to 540 g kg−1 and decreased to below 140 g kg−1 at HM. Seed quality as determined by tetrazolium (TZT), standard germination (SGT), and cold tests (CT) were gradually increased during seed development and maturation. The accelerated aging test (AAT) was not a reliable indicator for evaluating vigor of young seeds. At HM, seeds reached maximum quality for all treatments, with 92 - 98% viability by TZT and SGT, and 90 - 94% vigor by CT. Seed yield was increased by irrigation and TE application, but the interaction between these two treatments was not significant. Irrigation increased seed yield in both years by 10% due to the greater seed weight. However, TE increased seed yield by up to 18% only when applied at stem elongation stage in the second year. The increase in seed yield by TE was attributed to greater number of heads per stem. Neither irrigation nor TE had significant effect on above-ground biomass or stems m−2. Seed viability and vigor were slightly correlated with thousand-seed weight and stems m−2, respectively. However, none of them significantly affected seed quality. The study revealed that seed yield can be increased by: 1) a single irrigation application during first flowering stage (BBCH 55) in both years; and 2) TE application at a rate of 280 g a.i. ha−1 at the stem elongation stage (BBCH 32) in the second-year stand of red clover. Gibberellic acid (GA3) and abscisic acid (ABA) are two major phytohormones that affect seed germination. Changes in the contents of GA3 and ABA from seed development to maturation was conducted using seeds from untreated, TE-treated, irrigated, and TE plus irrigated plots. The GA3 and ABA were extracted from seeds using the solid phase method and were quantified by the liquid chromatography-tandem mass spectrometry (LC-MS/MS). The ABA content was high (1242 pg g−1 DW) at the early stage of seed development, and then gradually decreased to 388 pg g-1 DW at HM. The GA3 content did not change significantly during seed development until HM, ranging from 173 to 187 pg g−1 DW. Irrigation and TE application did not significantly affect the endogenous production of GA3 and ABA in the seeds. The ABA:GA3 ratio was high (6.7) at the early stage of seed development, but seed germination was low (24%). When seeds reached HM, the ABA:GA3 ratio dropped to 2.2 and seed germination increased to 93%. These results suggest that physiological dormancy is not a substantial concern in red clover seeds. However, before scarification, seed with hard seed coat at HM was approximately 34%. Hard seeds were scarified before conducting the germination tests. Maintaining seed quality during storage is essential to ensure value until the time of planting. Two red clover seed lots, untreated and field treated with TE, were stored for 24 months in three conditions: 1) uncontrolled environment of open warehouse (WH), 2) controlled room temperature (RT) at 20°C, and 3) controlled cold storage (CS) at 10°C. Seed quality, i.e., viability and vigor, was determined at 6-month intervals to measure the rate of deterioration after each storage period. Relative humidity (RH) was observed as 55% in RT and 90% in CS. Average seed viability of both seed lots stored in WH and RT and were 96% and 95%, respectively, throughout the 24-month storage period. Seeds stored at RT for 24 months maintained high vigor of 87% as determined by the AAT, whereas seeds stored at WH maintained vigor of 81% for 18 months and then dropped to 67% at the end of the 24-month storage period. In CS, seed viability and vigor gradually dropped, reaching 0% at the end of the 24-month storage period due to the adverse effect of the high RH (90%) in the CS. Seed maintained acceptable viability and vigor standards of above 80% when seed moisture content was less than 10%. This study suggests that red clover seeds from untreated and TE-treated plots can be stored safely under similar WH conditions used in this study for 18 months and in RT for 24 months when the initial seed moisture content is under 10%. The results of this study improved our understanding of the potential storability of the red clover seed in response to TE application.
Download or read book Aarsskrift written by and published by . This book was released on 1972 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Clover Science written by N.L. Taylor and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the literature on red clover since about 1985. In each of the 17 chapters, an effort was made to summarize the earlier literature and to integrate the recent findings into this background. The timing is appropriate with the present interest in sustainable agriculture, in which red clover was so prominent in the past. This is the first book to be published which deals solely with this important forage species. Audience: Primarily scientists and scientifically trained technicians who will appreciate an up-to-date summary on red clover.
Download or read book Proceedings written by and published by . This book was released on 1975 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Julkaisuja written by Suomen Maataloustieteellinen Seura and published by . This book was released on 1970 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forage Seed Production Temperate species written by Daphne T. Fairey and published by Cabi. This book was released on 1997 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The grasses and legumes grown in pastures and rangelands form the basis of the worldwide animal production industry. Some species also have a significant role in the sport and leisure industry, for playing surfaces such as golf courses and football fields. It is therefore vitally important to ensure that seed supplies of appropriate species are available for use on a commercial scale. This book is published in association with the International Herbage Seed Production Research Group. It brings together leading researchers and along with its companion volume Forage Seed Production Volume 2: Tropical and Subtropical Species (to be published in late 1998), provides the definitive resource for all those concerned with breeding and profitable seed production for grasses and legumes used within grazing systems or recreation and amenity provision. The book is in two parts. Part 1 covers all aspects relevant to seed production, including improving seed yield and quality, crop management, harvesting, processing and the international seed trade. Part 2 consists of eleven case studies from eight countries covering three continents. This book and its companion should be read by all seed scientists involved in the breeding and commercial production of grass and legume seed. They also represent a valuable asset for all commercial seed suppliers. Additionally, the information presented within the book is important for all students and lecturers within departments of agriculture and plant breeding.
Download or read book Scandinavian Pesticide Research 1966 written by Scandinavian Council for Applied Research. Pesticide Committee and published by . This book was released on 1966 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts of Papers Published in Maatalous Ja Koetoiminta Agriculture and Research written by and published by . This book was released on 1961 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Finnish Academy of Science and Letters written by Suomalainen Tiedeakatemia and published by . This book was released on 1967 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annales Botanici Fennici written by and published by . This book was released on 1972 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bericht ber das III Internationale Symposium f r Best ubung written by and published by . This book was released on 1975 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Horticultural Reviews Volume 24 written by Jules Janick and published by John Wiley & Sons. This book was released on 2010-06-01 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Horticultural Reviews presents state-of-the-art reviews on topics in horticultural science and technology covering both basic and applied research. Topics covered include the horticulture of fruits, vegetables, nut crops, and ornamentals. These review articles, written by world authorities, bridge the gap between the specialized researcher and the broader community of horticultural scientists and teachers.
Download or read book IBZ kombinierte Folge written by Otto Zeller and published by . This book was released on 1969 with total page 1392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1975 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
