Effect of Different Organic Substrates and Carbon and Nitrogen Sources on Growth and Shelf Life of Trichoderma harzianum
- سال انتشار: 1393
- محل انتشار: مجله علوم و فناوری کشاورزی، دوره: 16، شماره: 4
- کد COI اختصاصی: JR_JASTMO-16-4_004
- زبان مقاله: انگلیسی
- تعداد مشاهده: 38
نویسندگان
Department of Agriculture &agribusiness Manegment University of Karachi
Department of Plant Protection, Sidh Agriculture university Tandojam Pakistan
Department of Agriculture & Agri-business Manegment, University of Karachi
چکیده
Nine organic substrates viz., rice grains, sorghum grains, wheat grains, millet grains, wheat straw, rice husk, cow dung, sawdust, and poultry manure were used for mass multiplication of Trichoderma harzianum. Of these,sorghum grains followed by millet grains were the best substrates. The poultry manure appeared to be the most unsuitable substrate, whereas rice grains, wheat grains, wheat straw, and rice husk performed moderately well. Sucrose was the best carbon source and supported the highest colony growth of T. harzianum on Czapek’s Agar plates. Similarly, ammonium nitrate at ۳,۰۰۰ ppm appeared to be the most suitable nitrogen source and produced the highest colony growth as well as abundant conidia. A combined use of sucrose at ۳۰,۰۰۰ ppm as carbon source, and ammonium nitrate at ۳,۰۰۰ ppm as nitrogen source significantly enhanced the mycelial growth and conidial production by T. harzianum in wheat straw, rice husk, and millet grains, whereas, in sorghum grains and rice grains, the addition of carbon and nitrogen sources showed negative effect on sporulation of T. harzianum. Studies on shelf life of the inocula multiplied on various substrates showed that the populations of T. harzianum on all the substrates achieved the peak at ۶۰-۷۵ days incubation period and declined gradually thereafter. However, even after ۳۳۰ days, the populations were greater than the population at ۰-day. At ۳۴۵-۳۶۰ days interval, population was found to be less than the initial population at ۰-day.کلیدواژه ها
Biocontrol agent, Mass multiplication, shelf life, Trichoderma harzianumاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.