Premium
Phosphorus Absorption During Various Growth Stages of Spring Wheat and Intermediate Wheatgrass 1
Author(s) -
Boatwright G. O.,
Viets F. G.
Publication year - 1966
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1966.00021962005800020020x
Subject(s) - tiller (botany) , agronomy , dry matter , phosphorus , poaceae , nutrient , absorption (acoustics) , biology , winter wheat , chemistry , materials science , ecology , organic chemistry , composite material
Solution cultures were used to study the importance of P absorption during various growth stages of spring wheat and intermediate wheatgrass. Phosphorus was not needed in the solution cultures during all growth phases of the two crops. A supply of P for the first 5 weeks (up to heading for wheat) was adequate to produce maximum dry matter for both species and for maximum grain production of wheat. Maximum root development was achieved when P was supplied for the first 4 weeks of growth. Although plants absorbed only small quantities of P prior to tillering, this amount was important. When P was withheld for the first 2 weeks, tiller and secondary root development was hindered. Yields of wheat and wheatgrass tops and wheat grain were only 80, 59, and 42% of maximum, respectively. Although P uptake occurred after wheat headed, this P was not utilized for dry matter or grain production. Maximum accumulation of P occurred when P was initially withheld, but supplied later until harvest.