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University of Khartoum (1976)

Temperature and Nitrogen Fertilization in Relation to Flowering and Fruit Set in Tomatoes under Hot Arid Condition of the Sudan

Satti Mohamed El Zein Satti

Titre : Temperature and Nitrogen Fertilization in Relation to Flowering and Fruit Set in Tomatoes under Hot Arid Condition of the Sudan

Auteur : Satti Mohamed El Zein Satti

Université de soutenance : University of Khartoum

Grade : Master of Science (M Sc) 1976

Résumé
The study was initiated to test flowering and fruiting of two tamato cultivars, Ace and Chico, in a series of planting dates at intervals of 45 days starting October 15th, 1973 until July 15th, 1974 in a split plot design with three replicates. A separate investigation was conducted to test the effect of artificial pollination on fruit set during the period January-May 1975. The number or leaves preceding the first inflorescence was relatively fewer during January and June periods of temperature extremes. Significant differences were found between the two cultivars for most or the parameters tested. There was a consistent decline in the number of flowers farmed from December to June in both Chico and Ace. The greatest number or flowers was obtained for December planting. Nitrogen fertilization did not influence the number or flowers formed in the first three trusses. Plantings made during October and December gave higher fruit set in both cultivars, whereas in January and the subsequent planting dates, fruit set was markedly low or completely lacking. Tomatoes planted in March set fruits in the first and second truss at low nitrogen rates, but with higher rates of nitrogen fruit set was reduced in Chico and failed in Ace. With the advent of high temperature, nitrogen fertilization did not promote fruit set, consequently the use of high doses of nitrogen by the Eilafoon growers for summer tomato production is questioned. The pollination of tomatoes was poor during the period February May 1975. The use or an artificial pollinator improved fruit set under these adverse hot conditions in both cultivars tested

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Page publiée le 4 décembre 2013, mise à jour le 27 novembre 2018