Abstract
Plant nutrient interactions and fertilization is one of the most important factors affecting the quality of hazelnuts. This study aimed to determine the relationships between some plant nutrients and some hazelnut quality criteria and yields. The trial was carried out at Tombul hazelnut orchards in Hazelnut Research Station between 2009 and 2011. The trial was designed as randomized complete blocks of magnesium nutrient at five different doses and three replications per treatment. Hazelnut orchards were fertilized with 0, 100, 150, 200 and 250 kg ha-1 magnesium in each year. Magnesium fertilization significantly affected hazelnut yield and quality. However, increasing amounts of magnesium fertilizer in the soil, where they cause significant nutrient interactions were identified. The magnesium content of the soils significantly increased to 260.30 mg kg-1; however, because of the recent interactions, the available phosphorus and potassium of the soil decreased to 84.28 and 298.24 mg kg-1 significantly. The total yield was increased to 1747.05 kg ha-1 with 150 kg ha-1 magnesium fertilization. The protein quantity in the kernel was not changed but there was important increased in oil content, kernel ratio, shelled and kernel nut weight and healthy nut amounts, and also was decreased in the amount of empty and wrinkle nuts were identified. Although the total yield increased with increasing amount of magnesium fertilizer (200 and 250 kg ha-1), especially the phosphorus and potassium interactions were increased in the soil, and also some nut quality properties such as kernel ratio, shelled and kernel weights, total oil, healthy nuts, empty and wrinkle nuts were be getting worse. Key words: Corylus avellana L., fertilization, interactions, nutrients, quality.
Highlights
It is known that the 1.93% of the earth’s crust is composed of magnesium
The total yield increased with increasing amount of magnesium fertilizer (200 and 250 kg ha-1), especially the phosphorus and potassium interactions were increased in the soil, and some nut quality properties such as kernel ratio, shelled and kernel weights, total oil, healthy nuts, empty and wrinkle nuts were be getting worse
The results presented here evidence significant relations to plant nutrient interactions in soil and nut quality properties on Turkish hazelnut cultivars
Summary
It is known that the 1.93% of the earth’s crust is composed of magnesium. The magnesium appears in the earth’s crust in the form of carbonate, silicate, sulfate, chloride and it is commonly found in the importantSci. It is known that the 1.93% of the earth’s crust is composed of magnesium. In spite of the high amount of magnesium in the earth’s crust, today there is often a lack of magnesium in several agriculture fields. Kacar (1984) indicated that lack of magnesium is likely to be seen in the coarse-textured soil which is found in the areas that get heavy rain and the constant calcification of this kind of soil causes the lack of magnesium. Kacar and Katkat (2007) reported that the fact that chemical fertilizers which are produced with developing technology do not include magnesium, more products are harvested with recently developed varieties of plants and more nutritional elements are extracted from the soil increase the magnesium requirements. Excess nitrogen and potassium fertilizer is applied in soil solution comprising a high concentration with K+ and NH4+ ions with Mg2+ ions by competing plants that inhibit the uptake of Mg2+
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