Full TGIF Record # 12597
Item 1 of 1
Web URL(s):https://dl.sciencesocieties.org/publications/aj/pdfs/58/1/AJ0580010052
    Last checked: 12/09/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):MacLeod, L. B.; Carson, R. B.
Author Affiliation:MacLeod: Head, Soils and Plant Nutrition Section, Experimental Farm, Charlottetown, Prince Edward Island, Canada; Carson: Chief, Analytical Chemistry Research Service
Title:Influence of K on the yield and chemical composition of grasses grown in hydroponic culture with 12, 50, and 75% of the N supplied as NH4+
Source:Agronomy Journal. Vol. 58, No. 1, January/February 1966, p. 52-57.
Publishing Information:Washington: American Society of Agronomy
# of Pages:6
Keywords:TIC Keywords: Potassium; Yield response; Ammonium; Fertilization program; Fertilization rates; Nitrogen fertilization; Chemical composition; Tillers (vegetative); Dry weight; Tissue testing; Nitrogen; Bromus inermis; Dactylis glomerata; Phleum pratense
Abstract/Contents:"The role of K in NH4+ utilization by three grasses harvested at the early vegetative, late vegetative, and early heading stages of development was studied in a greenhouse hydroponic experiment. Nitrogen was supplied at 250 ppm K. Orchardgrass produced the highest dry matter yield followed by bromegrass and timothy. A high ammonium source (75%) with low K (50 ppm) resulted in a depression of yield, reduction in tillering, increased mortality, and significant changes in the percent K, Ca, Mg, P in the plant tissue. Provision of adequate K (250 ppm) improved NH4+ utilization, increased the yield of forage and reduced the content of total, protein, and nonprotein N in the tissue. Potassium reduced the accumulation of tissue N in soluble or nonprotein form. Nonprotein nitrogen was the same at the late vegetative and early heading stages as at the early vegetative stage of development. The reduced nitrogen fraction which ranged from 0.3 to 0.8% with 50 ppm K was lowered to a range of 0.1 to 0.5% with 250 ppm K. Significantly interaction effects for K and percent NH4+ showed that K increased the utilization of NH4+ nitrogen by grass and altered the percent of each nitrogen fraction present in the tissue."
Language:English
References:12
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
MacLeod, L. B., and R. B. Carson. 1966. Influence of K on the yield and chemical composition of grasses grown in hydroponic culture with 12, 50, and 75% of the N supplied as NH4+. Agron. J. 58(1):p. 52-57.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=12597
If there are problems with this record, send us feedback about record 12597.
Choices for finding the above item:
Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/58/1/AJ0580010052
    Last checked: 12/09/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Find Item @ MSU
MSU catalog number: S 22 .A45
Find from within TIC:
   Digitally in TIC by record number.
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)