Effects of nitrogen form on growth development yield and composition of cucumber in sand culture

D.Y.; Zhang, F.; Liu, B.

Acta Horticulturae Sinica 16(1): 45-50

1989


Accession: 007280521

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Abstract
There are five different treatments with NH4-N: NO3-N at 0:100,10: 100, 10:90, 30:70, 50:50 and 100:0, and urea were carried out in cucumber (Cucumis sativus L. cv. Jin Za Yi Hao) grown in sand. The total N level in nutrient solution was 16 mM. The results showed that NH4-N significantly increased leaf area, shoot length and number of female flower, promoting anthesis of cucumber plants in the fall--winter experiments, and increased leaf area in stage and early yield in the spring-summer experiments. But the total yield was not affected significantly by the treatments. With increasing ratio of NH4-N in nutrient solution, concentrations of N, P and soluble sugar of leaf were increased, but K, Ca, Mg and Mo were decreased. The plants received urea grew poorly in the fall-winter experiments, but grew very well in the spring-summer experiments. The results recommended that NH4-N could be used as nitrogen source up to 50% of total N in nutrient solution, and that urea could be used singly or partially in spring-summer season in sand culture of cucumber.