Abstract
Asparagus plants cv. “Epos” were planted in the aeroponic system with recirculation in two cycles. The effect of asparagus plant age and crown size on fern growth were studied. The results show that the age of asparagus plants affected the number of ferns – the number of assimilation shoots increased with age – while the weight of asparagus crowns had an effect on the number and total weight of shoots. An increase in crown weight by about 1000 g caused an increase in the number of shoots by about 6, while the weight of one shoot increased by approx. 144 g. The age of aasparagus plants was also a significant factor for dry weight, % Brix and total carbohydrate contents in roots before the assimilation season as well as glucose, fructose, sucrose, GFS and total carbohydrate contents in roots after the assimilation season.
References
Hartmann H. D., 1985. Possibility of predicting the amount of asparagus yield in middle Europe. In: Lougheed E.C., Tiessen H. (eds), Proceedings of the 6th Int. Aspar. Symp., University of Guelph, Guelph, Ontario, Canada, 318–323.
Haynes R.T., 1987. Accumulation of dry matter and changes in storage carbohydrate and amino acid content in first 2 years of asparagus growth. Sci. Hort., 32, 17–23.
Hughes A.R., Nichols M.A., Wooley D., 1990. The effect of temperature on the growth of asparagus seedlings, Acta Hort., 271, 451–456.
Johansen H.N., Glitso V., Knutsen K.E.B., 1996. Influence of extraction solvent and temperature on the quantitative determination of oligosaccharides from plant materials by high performance liquid chromatography. J. Agric. Food Chem., 44, 1470–1474.
Knaflewski M., 1994. Yields predictions of asparagus cultivars on basis of summer stalk characteristic. Acta Hort., 371, 161–168.
McGrady J. Tilt P., 1990. A preliminary report on asparagus harvest duration, storage carbohydrates and yield in southwestern USA. Aspar. Res. Newslett., 7(2), 5–11.
Pressman E., Schaffer A. A., Compton D., Zampski E., 1993. Seasonal changes in the carbohydrate content of two cultivars of asparagus. Sci. Hort. 53, 149–155.
Robb A.R., 1984. Physiology of asparagus (Asparagus officinalis) as related to the production of the crop. N.Z J. Exp. Agric., 12, 251–260.
Shelton D.R., Lacy M.L., 1980. Effect of harvest duration on yield and depletion of storage carbohydrates in asparagus roots. J. Am. Soc. Hort. Sci. 105, 332–335.
Siomos A.S., Pontikidou D.G., 2000. Seasonal changes of dry matter and sugars in the fleshy roots of asparagus seedlings. J. Veg. Crop Prod. 6(1), 45–52.
Taga T., Iwabuchi H., Yamabuki K. Sato S., 1980. Analysis of cultivation environments on growth of asparagus. 1. Effects of harvesting term on the yields and the carbohydrate in the roots. Bull. Hokkaido.
Wilcox-Lee D., Drost D. T., 1990. Effect of soil moisture on growth, water relations and photosynthesis in an open pollinated and male hybrid asparagus cultivar. Acta Hort. 22, 22–24.
Wilcox-Lee D., Drost D. T., 1991. Tillage reduces yield and crown, fern and bud growth in a mature asparagus planting. J. Am. Soc. Hort. Sci, 116, 937–941.
Wilson D.R., Sinton S.M., Wright C.E., 1999. Influence of time of spears harvest on root system resources during the annual growth cycle of asparagus, Acta Hort. 479, 313–320.
Wilson D.R., Cloughley C.G., Jamieson P.D., Sinton S.M., 2002. A model of asparagus growth physiology. Acta Hort. 589, 297–301.
Wooley D.J., Hughes A.R., Nichols M.A., 1999. Carbohydrate storage and re-mobilization in asparagus: studies using dry weight changes, C-14 and high pressure liquid chromatography. Acta Hort. 415, 201–207.
Yen Y.F., Nicholas M.A., Wooley D.J., 1996. Growth of asparagus spears and ferns at high temperatures. Acta Hort. 415, 163–174.
Downloads
Download data is not yet available.
