Effects of mix composition, fertilization, and pH on citrus grown in U.C.-Type potting mixtures under greenhouse conditions
AuthorsE. M. Nauer
C. N. Roistacher
C. K. Labanauskas
Authors AffiliationsE. M. Nauer was Associate Specialist in the Horticultural Science Department in the University of California Citrus Research Center and Agricultural Experiment Station, Riverside; C. N. Roistacher was Laboratory Technician IV, Plant Pathology, in the University of California Citrus Research Center and Agricultural Experiment Station, Riverside; C. K. Labanauskas was Lecturer and Associate Horticulturist in the University of California Citrus Research Center and Agricultural Experiment Station, Riverside.
Hilgardia 38(15):557-567. DOI:10.3733/hilg.v38n15p557. November 1967.
Effects of mix composition, fertilization, and pH on citrus seedlings grown in several U.C.-type potting mixtures in containers were studied over a 5-year period. The mixtures, consisting of fine sand, sphagnum peat moss, and redwood shavings consistently produced greater growth than did a mix containing clay loam, fine sand, and peat moss. Copper deficiency, often encountered in plants grown in soils and soil mixtures containing peat, could be prevented by the addition of CuSO4 to the mixtures. Availability of other micronutrients to the plants appeared to be influenced primarily by soil pH which could be changed by varying materials used in the added fertilizer solution. When the soilleachate pH was higher than approximately 7.0, plants exhibited more micronutrient deficiency leaf patterns and made less growth.
The system which evolved as a result of these experiments has been tried with marked success in one large-scale greenhouse operation which previously had experienced difficulty in producing vigorous citrus seedlings free of nutrient-deficiency symptoms.
Allison R. V., Bryan O. C., Hunter J. H. The stimulation of plant responses on the raw peat soils of the Florida everglades through the use of copper sulphate and other chemicals. Fla. Agr. Exp. Sta. Bul. 1927. 190:33-80.
Baker K. F., Schoonover W. R., Sciaroni R. H., Matkin O. A., Chandler P. A., Roistacher C. N., Munnecke D. E., Ferguson J., Durbin R. D., Huffman J. W. The U.C. system for producing healthy container grown plants. Univ. of Calif. Manual 1957. p.23.
Camp A. F., Reuther Walter. Studies on the effect of zinc and other unusual mineral supplements on the growth of horticultural crops. Fla. Agr. Exp. Sta. Ann. Rept. 1937. 1937:132-35.
Camp A. F., Fudge B. R. Some symptoms of citrus malnutrition in Florida. Fla. Agric. Exp. Sta. Bul. 1939. 335:1-55.
Duncan D. B. Multiple range and multiple F tests. Biometrics. 1955. 11:1-42. DOI: 10.2307/3001478 [CrossRef]
Forsee W. J. Jr. Recent plant responses to some of the micro elements on everglades peat. Soil Sci. Soc. of Fla. Proc. 1940. 2:53-58.
Forsee W. J. Jr. Minor element deficiencies and field corrections established by research in Florida vegetables. Proc. Fla. State. Hort. Soc. 1952. 65:154-59.
Guest P. L., Chapman H. D. Some effects of pH on the growth of citrus in sand and solution cultures. Soil Sci. 1944. 58:455-65. DOI: 10.1097/00010694-194412000-00005 [CrossRef]
Labanauskas C. K., Nauer E. M., Roistacher C. N. Initial soil-mix and post-planting liquid fertilization effects on nutrient concentrations in Valencia orange seedling leaves. Hilgardia. 1967. 38(15):569-77. DOI: 10.3733/hilg.v38n15p569 [CrossRef]
Matkin O. A., Peterson F. H., Cochrane R. D. Evaluation of an ion-exchange fertilizer. Proc. Amer. Soc. Hort. Sci. 1962. 80:636-44.
Nauer E. M., Calavan E. C., Roistacher C. N., Blue R. L., Goodale J. H. The citrus variety improvement program in California. Calif. Citrograph. 1967. 52(4):133 142, 144, 146, 148, 151-52.
Pratt P. F., Harding R. B., Jones W. W., Chapman H. D. Chemical changes in an irrigated soil during 28 years of differential fertilization. Hilgardia. 1959. 28(15):381-430. DOI: 10.3733/hilg.v28n15p381 [CrossRef]
Reitz H. J., Leonard C. D., Stewart Ivan, Spencer W. F., Koo R. C. J., Deszyk E. J., Smith P. F., Rasmussen G. K. Recommended fertilizers and nutritional sprays for citrus. Fla. Agric. Exp. Sta. Bul. 1959. 536A:1-16.
Smith P. F. Studies on the growth of citrus seedlings with different forms of nitrogen in solution cultures. Plant Physiology. 1957. 32(1):11-15. DOI: 10.1104/pp.32.1.11 [CrossRef]
Spencer W. F. Effects of heavy applications of phosphate and lime on nutrient uptake, growth, freeze injury, and root distribution of grapefruit trees. Soil. Sci. 1960. 89(6):311-18. DOI: 10.1097/00010694-196006000-00002 [CrossRef]