The Effect of Aeration on Growth of the Tomato in Nutrient Solution

Growth of Tomato Roots as Influenced by Oxygen in the Nutrient Solution

“…Drscussmx.e-c-The results obtained with tomato plants grown in aerated and non-aerated cultures gives additional evidence that aeration is important for obtaining the maximum growth of this species in water culture. The results are in agreement with those of Clark and Shive (1932), Arrington and Shive (1936), Durell (1941), and VI am is and Davis (1944). On the other hand, Went (1943) obtained more rapid stem growth with tomato plants in unaerated solution than in aerated when he induced additional roots to develop out of the nutrient solution.…”

“…These conclusions were based on the dry weights of the plants. Durell (1941) aerated water cultures of tomatoes at several rates and found that aeration increased root, stem, and leaf growth and yield of fruits. The lowest rate of bubbling air through the solution was sufficient for the maximum growth of roots and production of fruits but stem and leaf growth were greatest with the highest rate of aeration.…”

“…The carbon dioxide content of the non-aerated solution, on the other hand, rose to what appeared to be serious proportions, when compared with the magnitude of the oxygen changes, but judging by the results of the carbon dioxide experiment, it reached a value which might have been slightly limiting only at the close of the experiment. Andrews and Beals (1919) and Durell (1941) made rough quantitative determinations of the amount of aeration needed for the best growth of the species they studied, but the lack of any solution analyses left the critical conditions of the solutions unknown. To obtain a fundamental basis for the rate of aeration it is necessary, first of all, to determine the optimum concentration of oxygen in the solution for the species under consideration.…”

Effects of Oxygen Tension on Certain Physiological Responses of Rice, Barley, and Tomato

“…This advantage is greatest in the rice plant, much less in barley, and nlegligible in tomato; it suggests the quantity of oxygen which may be transported from the shoots to the roots by anatomical adaptation. The evidence further (6). HALL, BRENCHLEY, and UNDERWOOD (10) noticed a 50 per cent.…”

Garden rose understock-scion responses to various climatic conditions.

“…These expressions are termed incompatibility or incongeniality (Bu ck, 1964). Dean (1933), Durell (1941), Loehwing (1934), McPherson (1939, and Sifton (1945) have worked on soil aeration. Work on aeration as it affects water absorption and transpiration was discussed by Kramer (1945).…”