This study was carried out in Rize province in 2016, on fresh leaf samples collected from an organic tea plantation. In this study, the aim was to determine the effect of pruning age (1st year, 3rd year and 5th year following the last pruning) and diurnal variability on antioxidant activity and dry matter rate in tea leaves depending on shoot periods. When the pruning age was considered, the highest antioxidant activity was obtained from the plants which were in 5th pruning age in the 1st shoot period with 4991,1 μmol FeSO4/g dw. In terms of the same trait, the effect of pruning age on antioxidant activity during the 2nd shoot period was insignificant, while the highest antioxidant activity in the third shoot period was obtained from 1st pruning age with 7229.2 μmol FeSO4/g dw. As a general average, considering intraday collecting time, antioxidant activity in leaves collected in morning (07.00) and at noon (12.00) was very close to each other, while the collected leaves in the evening (17.00) had higher values. The dry matter rates obtained from the 1st, 3rd and 5th pruning ages were 23.45%, 25.23% and 25.45% respectively. When the shoot period was considered, the lowest dry matter rate was 20.17% in the first shoot period and the highest dry matter rate was 28.8% in the 2nd shoot period and high values were obtained from the leaves collected at noon.

Tea, one of the most widely consumed beverages in the world, is produced from the leaves of the plant Camellia sinensis L.. Tea has important physiological properties and potential health benefits due to the presence of compounds such as polyphenols, amino acids, vitamins, carbohydrates, caffeine, and purine alkaloids. Tea is produced in three types as green tea (unfermented), oolong tea (partially fermented), and black tea (fully fermented). Black tea is consumed worldwide, whereas green and oolong teas are consumed mainly in Asia and North Africa. The total tea production in the world consists of about 78% black tea, 20% green tea and

Yabani mantarlardan zehirlenme riski korkusu insanları kültüre alınabilen mantar türleri üretimini artırmaktadır. Bu mantar türleri içerisinde yer alan istiridye mantarı üretimindeki bazı avantajlar nedeniyle son yıllarda tercih edilir olmuştur. Mantar üretiminin artmasında üretim ortamlarında bölgesel çeşitliliğin sağlanması çok önemlidir. Bu çalışmada Van ve çevresine mantar üretimini yaygınlaştırmak ve bölge üreticilerinin kolay temin edebilecekleri saman ve atıl durumda olan demlenmiş çay atıklarında üretimin etkinliğini araştırmak amaçlanmıştır. Buğday samanı, demleme çay atığı ve hazır mantar üretim kitleriyle kurulan çalışma tesadüf parselleri deneme desenine göre dört tekerrürlü olarak tasarlanmıştır. Elde edilen mantarlarda, ilk hasat, karpofor ağırlığı, toplam verim, karpofor ölçüleri, makro ve mikro elementler parametrelerine bakılmıştır. Yapılan çalışmada çay ortamında üretilen mantar verilerinin, mantar üretimi yapan firmalardan alınan hazır kitlerden alınan mantar verilerine daha yakın sonuç alındığı görülmüştür.