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The Nitrogen Content of Poa Pratensis : Its Range and Relation to Flowering Date 1
Author(s) -
Sullivan J. T.,
Garber R. J.
Publication year - 1941
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/agronj1941.00021962003300100010x
Subject(s) - citation , forage , library science , agronomy , biology , computer science
URING studies of individual plants of Kentucky bluegrass, a D ' survey of the range of variation in total nitrogen (crude protein) was made and certain relationships of the total nitrogen content to the date of flowering were noticed. That young grass of all species is richer in protein than more mature grass and that the percentage of protein decreases regularly up to the stage of seed ripening is common knowledge. Henry and Morrison,3 among many others, give data to support this. It should follow that late strains which have not proceeded as far to maturity as early strains should be higher in protein than early strains at any comparable date up to maturity. Evans and Thatchel.4 have shown that this is true with timothy. Differences in composition between early and late flowering plants at other times than during the reproductive period have not been pointed out. In this paper are presented data concerning the range in composition of Kentucky bluegrass plants and the association of the date of flowering of an individual plant with its nitrogen content during flowering and at non-reproductive periods of its growth.