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RESEARCHES CONCERNING THE RELATIONSHIP BETWEEN THE TRUNK GROWING AND THE FRUITS PRODUCTIONS, UNDER THE INFLUENCE OF IRRIGATION AND FERTILIZATION WITH NITROGEN

1970; AcademicPres; Volume: 62; Linguagem: Inglês

10.15835/buasvmcn-agr

2457-1385

I. Calinovici,

Horticultural and Viticultural Research

The researches were made on an apple tree plantation, on an experimental field organized within the Lipova’s fruit-growing basin. The biological used material was the Starkrimson type, grafted on the father plant M9, being planted on bands of two rows at 1,5 m distance between trees from the band and on the row and 3,5 m between bands. Application of irrigation and fertilization with nitrogen determined significant efficiency of the trunk growing. The fertilized variants with 100 kg/ha nitrogen determined significant efficiency of 3,61 cm2 comparing to the fertilized variants of 50 kg/ha nitrogen and non fertilized variants. Irrigation at the level of 75% I.U.A. determined a significant efficiency of 4,82 cm2 of the transversal section of the trunk comparing to the non irrigated variants and those irrigated at the level of 50% I.U.A. determined a distinctly significant efficiency of 2,39 cm2 comparing to the non irrigated witness. The growing of the trees’ trunk depends in a great measure of the initial measure of the thickness of the trunk. Under the non irrigation conditions the thickness growing of the trunk registered smaller values than under the non irrigation conditions with different norms. Relation between the growing efficiency and initial thickness of the trunk is more dependant as the level of supplying with water is lower.