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VARIATIONS IN SEED QUALITY BETWEEN CERTIFIED SEED LOTS OF PERENNIAL RYEGRASS, AND THEIR RELATIONSHIP TO NITROGEN SUPPLY AND MOISTURE STATUS DURING SEED DEVELOPMENT
Author(s) -
Ene B. N.,
Bean E. W.
Publication year - 1975
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1975.tb01376.x
Subject(s) - perennial plant , seedling , anthesis , germination , agronomy , biology , dry weight , water content , horticulture , cultivar , engineering , geotechnical engineering
Ten Certified Seed lots of S23 perennial ryegrass produced in different counties in England during 1966, and ten lots produced in 1972, were examined for differences in characters affecting seed quality. The 1966 seed lots differed significantly in 1000–seed weight, germination rate, N content of the seed and seedling dry weight, and there was a significant correlation between seed N content and the seedling weight of the progeny. In both S23 and S24 perennial ryegrass N applied at inflorescence emergence or at anthesis increased N content of the seed and seedling dry weight. In S24 application of N at anthesis increased 1000–seed weight also. When plants of S23 perennial ryegrass were subjected to reduced moisture supplies their seed N content was increased. It is concluded that late N applications to grass seed crops may affect seed quality.