Ömer Lütfü ELMACI, Bülent YAĞMUR, Funda ŞENER, Müzeyyen SEÇER

Mineral gübrelemenin organik gübreli plantasyonda yetişmiş kuşkonmazın (Asparagus officinalis L.) sürgün kalitesine etkisi

Bu çalısmada; N, K ve Mg’lu gübrelerin, organik gübreli plantasyonda yetismis kuskonmaz (Asparagus officinalis L.) bitkilerinin toprak altı sürgün (=meyve) kalitesine etkileri arastırılmıstır. Denemede Azot 10, 20, 30 kg/da, Potasyum 8, 16, 24 kg/da ve Magnezyum 4, 8, 12 kg/da olarak uygulanmıslardır. Deneme üç tekerrürlü ve tesadüf blokları desenine göre kurulmustur. Toprak altı sürgün örnekleri, gübre uygulamasından yaklasık 6 ay sonra alınmıs ve örneklerde; çap, taze agırlık, L-askorbik asit (C vitamini) miktarları ile sürgün uç, orta ve dip kısımlarında toplam suda çözünebilir kuru madde (TSÇKM) degerleri belirlenmistir. Kurutulan toprak altı sürgün örneklerinde ise makro ve mikro element miktarları tayin edilmislerdir. Kuskonmaz taze sürgün agırlıkları 25.8 (N1)-37.9 (Mg2) g arasında degismistir. Sürgün agırlıgı üzerine etki Mg> N> K seklindedir. statistiki önem tasımamakla birlikte N ve Mg’un sırası ile 20 ve 8 kg/da orta, K’un ise 8 kg/da’lık ilk dozu sürgün agırlıgı açısından en etkili gübre dozları olarak bulunmuslardır. Sürgün çapları 11.2 (N1) – 15.1 (Mg2) mm arasında bulunmus, gübreler arasında gösterdigi farklılık istatistiki önem arzetmemistir. Toprak altı sürgünlerin L-askorbik asit içerigi 22.0 (Kontrol) – 39.6 (K3) mg/100 g taze örnek arasında degismis, gübre etki sıralaması K>Mg>N seklinde olmus, gübre uygulamaları istatistiki anlamda p

Effect of mineral fertilizers on spears quality of Asparagus officinalis L. grown on organic fertilized plantation

In this study, the effect of N, K and Mg fertilizers on spear quality of Asparagus officinalis (L.) grown on organic fertilized plantation was investigated. Spears samples were harvested nearly six months after fertilizer application and their diameter, fresh weight, the amount of L-ascorbic acid (Vitamin C) and total soluble solids of upper, middle and lower segments were determined. In dried spear samples macro and micro elements were analyzed. Fresh weight of spears changed between 25.8 (N1)-37.9 (Mg2) g. The effect on spear weight was as Mg> N> K. Although there were no statisticaly significant difference, medium levels of N and Mg with 20 and 8 kg/da respectively and first doses of K with 8 kg/da were found the most effective fertilizer doses applied on spear weight. Diameter of spears was found between 11.2 (N1)-15.1 (Mg2) mm and the difference between fertilizers was not significant. L-ascorbic acid content of spears varied from 22.0 (control) to 39.6 (K3) mg/100 g fresh samples and was effected from fertilizer applications at pMg>N. Total soluble solid content of upper segment with 9.30% by K2 was nearly twice higher than that of middle (5.33% by K3) and lower (5.20% by K3) segment. Total nutrient content of spears varied from 6.88 to 8.07% in dry weight basis and from 0.48 to 0.57% in fresh weight basis. Mineral N, K and Mg fertilization affected statistically only the K content of spears grown on organic fertilized conditions.

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