Studies on the Nitrogenous Nutrition of Rice

Studies on the Nitrogenous Nutrition of Rice SHADED LEAVES LIGHT INTENSITY I I' i 17,600 ,4000 Ua wI- o 40 r1 50 U.0 /~ ,E, - " a I~ Ij ~~ r a 10,000 .Z 72,500 Fn increased. From 3:00 to 3:30 P.M., light intensity decreased and stomatal opening started increasing. The tests were discontinued at 3:30 because of rain. The stomata of leaves under shade remained wide open throughout both days. These results are in agreement with those obtained by Nutman (6), and Franco (3), by means of porometers. A partial stomatal opening was noted at the beginning of both of the above tests, before the light intensity was measurable. This opening was probably caused by dew, as has been reported by Alvim (1) for other plants. LITERATURE CITED 5.000 O Ow 60 I-j .. . Rx 90 0 xI00 mn mint TRALNo MFrLU%k 2,500 Tno J, I *- aI II Ii 6 7 8 9 10 11 12 1 2 3 4 5 6 HOURS OF DAY FIG. 2. Cycle of stomatal opening of coffee leaves, both in sunlight and in shade, as determined by the infiltration technique with the series n-dodecane-Nujol (October 16, 1952). ing the periods of strong illumination in the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Studies on the Nitrogenous Nutrition of Rice

Jan 19, 1954

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Publisher
American Society of Plant Biologist
Copyright
Copyright © 1954 by the American Society of Plant Biologists
ISSN
1532-2548
eISSN
0032-0889
Publisher site
See Article on Publisher Site

Abstract

SHADED LEAVES LIGHT INTENSITY I I' i 17,600 ,4000 Ua wI- o 40 r1 50 U.0 /~ ,E, - " a I~ Ij ~~ r a 10,000 .Z 72,500 Fn increased. From 3:00 to 3:30 P.M., light intensity decreased and stomatal opening started increasing. The tests were discontinued at 3:30 because of rain. The stomata of leaves under shade remained wide open throughout both days. These results are in agreement with those obtained by Nutman (6), and Franco (3), by means of porometers. A partial stomatal opening was noted at the beginning of both of the above tests, before the light intensity was measurable. This opening was probably caused by dew, as has been reported by Alvim (1) for other plants. LITERATURE CITED 5.000 O Ow 60 I-j .. . Rx 90 0 xI00 mn mint TRALNo MFrLU%k 2,500 Tno J, I *- aI II Ii 6 7 8 9 10 11 12 1 2 3 4 5 6 HOURS OF DAY FIG. 2. Cycle of stomatal opening of coffee leaves, both in sunlight and in shade, as determined by the infiltration technique with the series n-dodecane-Nujol (October 16, 1952). ing the periods of strong illumination in the

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