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Differential Response of Orchardgrass Varieties (Dactylis glomerata L.) to Nitrogen and Phosphorus under Controlled Soil Temperature and Moisture Conditions
Author(s) -
Finn B. J.,
Mack A. R.
Publication year - 1964
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1964.03615995002800060029x
Subject(s) - moisture , water content , agronomy , nutrient , environmental science , phosphorus , yield (engineering) , human fertilization , zoology , chemistry , biology , geology , organic chemistry , materials science , geotechnical engineering , metallurgy
In a greenhouse experiment, the growth and nutrient uptake of four varieties of orchardgrass were differentially affected by soil temperature and moisture. The yield of tops, for all varieties, was increased by a rise in soil temperature from 10°C. to 20°C. and by a rise in soil moisture from 25% to 75% of the available soil moisture capacity. The yield of roots was increased by a decrease in soil temperature from 20°C. to 10°C. when associated with the high soil moisture level. Under warm soil conditions a rise in available soil moisture generally produced similar increases in top yields for all varieties; whereas, under cool soil temperature a rise in soil moisture increased top yields in the following order: Frode > Rideau > S‐143 = Chinook. Under the same moisture and temperature condition root yields were in the order of Frode > Chinook = Rideau. The influence of N fertilization on herbage yield and on N uptake was only slightly affected by soil temperature and moisture. A rise in soil temperature and soil moisture increased the uptake of soil P and decreased the effect of applied P on yield and P uptake. Under P fertilization the uptake of P by the varieties differed with environment: the order was S‐143 > Frode = Rideau > Chinook at 20°C. and 75% moisture, and Frode = Rideau > S‐143 = Chinook at 10°C. and 25% moisture.