Çukurova koşullarında değişik bradyrhijobium japonicum izolatlarıile aşılamanın faklı soya çeşitlerinde nodülasyon, n2-fiksasyonu ve verime etkisi

TEZ2767Tez (Doktora) -- Çukurova Üniversitesi, Adana, 1998.Kaynakça (s. 104-118) var.xii, 118 s. ; rnk. res. ; 30 cm.

Adıyaman-Çamgazi ve Gaziantep-Kemlin-Kayacık sulama alanlarında yer alan yaygın toprak serilerinin bazı mikrobiyolojik özelliklerinde inkübasyon süresine bağlı olarak meydana gelen değişmeler

TEZ1142Tez (Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 1992.Kaynakça (s. 102-110) var.x, 112 s. ; 30 cm.

Buğday anızı, mısır sapı ve tütün atığının buğday vejetasyonu altında toprakta denitrifikasyon kaybına etkisi

A field experiment was conducted to determine the effects of different organic residues (OR) (e.g., wheat straw corn straw and tobacco residues) on nitrogen mineralization and denitrification loss ($N_2O$-N) using application rates recommended to local farmers. Nitrate and ammonium analyses were carried out on periodically collected soil samples. In-situ denitrification loss was determined using the acetylene inhibition technique (AIT). The results revealed that OR application increased N mineralization significantly. In the favorable conditions for nitrification and intensive mineralization period, $NO_3$--N accumulation at 0-60 cm depth peaked at 163.0, 177.7 and 226.6 kg N ha-1 in plots with wheat straw, corn straw and tobacco waste, respectively. In-situ denitrification measurements showed that intensive mineralization, depending on temperature and humidity conditions, significantly increased denitrification losses. The denitrification values measured showed a variation between 7.58 and 17.40 kg $N_2O$-N ha-1. The results also showed that the effect of organic substrates on N loss via denitrification was highly dependent on the type of organic substrate used, and the C/N ratio of the organic substrate played an important role in N loss by denitrification.A field experiment was conducted to determine the effects of different organic residues (OR) (e.g., wheat straw corn straw and tobacco residues) on nitrogen mineralization and denitrification loss ($N_2O$-N) using application rates recommended to local farmers. Nitrate and ammonium analyses were carried out on periodically collected soil samples. In-situ denitrification loss was determined using the acetylene inhibition technique (AIT). The results revealed that OR application increased N mineralization significantly. In the favorable conditions for nitrification and intensive mineralization period, $NO_3$--N accumulation at 0-60 cm depth peaked at 163.0, 177.7 and 226.6 kg N ha-1 in plots with wheat straw, corn straw and tobacco waste, respectively. In-situ denitrification measurements showed that intensive mineralization, depending on temperature and humidity conditions, significantly increased denitrification losses. The denitrification values measured showed a variation between 7.58 and 17.40 kg $N_2O$-N ha-1. The results also showed that the effect of organic substrates on N loss via denitrification was highly dependent on the type of organic substrate used, and the C/N ratio of the organic substrate played an important role in N loss by denitrification

The effect of green manure crops of legumes on grain yield and some agronomical characters of maize grown on different nitrogen doses

Bu araştırmada, Çukurova koşullarında yeşil gübre olarak kullanılan, bakla, bakla+fiğ karışımı, iskenderiye üçgülü ve çemen bitkilerinin, değişik azot dozları (0, 12, 24 kg N/da) uygulanarak yetiştirilen mısır bitkisinde tane verimi ve bazı tarımsal özelliklere etkisi incelenmiştir. Araştırmada ayrıca, baklagil bitkilerinin, toprağa kazandırdığı nodül, kök ve kök üstü aksamlarının kuru madde verimleri ile bu aksamlardaki toplam azot değerleri de belirlenmiştir. İki yıllık bulgulara göre, baklagil bitkileriyle yapılacak yeşil gübreleme ile toprağa, nodül+kök+kök üstü aksamı aracılığıyla 27.5-33.8 kg/da arasında değişen miktarlarda toplam azot kazandırılabileceği ve yeşil gübrelemeden sonra daha az azotlu gübre kullanarak mısır yetiştirilebileceği saptanmıştır. Buğday üzerine ekilen ve 24 kg N/da azot verilen uygulamada 1055 kg/da mısır ürünü alınırken, 12 kg N/da gübre verilen uygulamada, bakla+fiğ üzerine ekilen mısırdan 1141 kg/da, çemen üzerine ekilen mısırdan 1122 kg/da, bakla üzerine ekilen mısırdan 1124 kg/da ve iskenderiye üçgülü üzerine ekilen mısırdan 1207 kg/da, tane mısır ürünü elde edilmiştir. Yeşil gübreleme uygulamasında, Çukurova Bölgesi'nde yaygın olarak uygulanan buğday+ikinci ürün mısır üretim sistemine göre, mısır bitkisinin ekiminin bir ay kadar daha erken yapılabilme şansı doğmaktadır.In this research, the effect of green manure crops of legumes such as horsbean, mixture of horsbean+vetch, alexandrie klee, fenugreek on grain yield and some agronomical characters of maize grown on different nitrogen doses (0, 12 and 24 kg N da -1) were investigated. Also, dry matter of nodule, root and biomass of above ground and total amount of N were determined. According to the resulting two years, the total amount of N fixed to the soil by the way of nodule, root and biomass of above ground was between 27.5-38.8 kg da-1. Also it was determined that maize could be grown using less nitrogen fertilizer after the application of green manure. The grain yields of maize applied 24 kg N da-1 and 12 kg N da-1 after the growth of wheat were 1055 kg da-1 and 1141 kg da-1 respectively. The grain yields of maize applied 12 kg N/da-1 after the growth of mixture of horsbean+vetch, fenugreek and horsbean and alexandria klee were 1141, 1122, 1124, 1207 kg da-1 respectively. It was determined that after the application of green manure, maize could be sown earlier than the crop system of wheat+maize cultivated commonly in Çukurova region