Premium
Yield‐nutrient concentration relationships in young maize, as affected by applied nitrogen
Author(s) -
Terman Gilbert L.,
Allen Seward E.
Publication year - 1974
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740250909
Subject(s) - nutrient , dry matter , loam , chemistry , nitrogen , agronomy , ammonium , urea , dilution , zoology , ammonium nitrate , nitrate , biology , soil water , ecology , physics , organic chemistry , thermodynamics
Responses of maize ( Zea mays L.) to several rates of N as ammonium nitrate and urea were determined on Mountview silt loam in greenhouse pots, with other nutrients applied uniformly. Harvests of tip halves of leaves, remaining tops and roots were made at 28, 36 and 47 days after planting. Yields of dry matter and uptake of N, P, K, Ca, Mg, Mn and Zn by the maize tops increased markedly with amount of applied N and length of growth period. Concentrations of N, P, Ca, Mg, Mn and Zn both in leaves and entire tops also increased at 28 and 36 days with rate of applied N, but K concentrations decreased. Dilution of other nutrients with response to N was the dominant trend at 47 days. Concentrations of all nutrients in the roots decreased with continuing growth and most nutrients were diluted with increasing response to higher N rates as a result of greater translocation to the tops.