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حسن رضا
اعتباریان
author
text
article
1992
per
Fusarium wilt of tomato caused by the fu is Fusarium oxysporum f.sp lycopersici is one of the most prevalent and destrutive disease of tomato in Varamin area. The mean percentage of infection during the period of 1983 and 1989 was 27.3 in tomato fields.In some places of Varamin area entire fields of tomato are killed before a crop can be harvested. This desease can att Dk tomato plant. at any age. Symdtoms of disease and morphology of the fungus were investigated in this paper. Laboratory experiments were conducted to evaluate the effect of 100 PPM concentration of 13 fungicides against the pathogen on PDA culture, The results indicated that Iprodion+ carbendazim,Benomyl and carbendazim reduced fungal growth at 100 percentage after lOdays. In the other experiment the concentrations of 0.1,1,10 and 100 PPM of Iprodion + carbendazim,Carbendazim and Benomyl were tested on PDA culture. The results shwod that, The concentration of 10 and 100 PPM of theses fungicides were The most effective.
The results of field experiment conducted with soil drench. of Iprodion + carbendazim,Carbendazim and Benomyl showed that,Benomyl at 10 PPM were the most effective followed by Iprodione + carbendazim and carbendazim.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
3و4
v.
0
no.
1992
https://jijas.ut.ac.ir/article_16180_7a3ba126914d3e6e56bdf8d56e1edc6a.pdf
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حسین
فضلی
author
بهمن یزدی
صمدی
author
text
article
1992
per
sixty four Iranian and introduced foreign alfalfa land races and cultivars were studied in the Experimental farm, College of Agriculture, Karadj,Iran. A Partially balanced lattice spuare desing with four replications was used. The following characteristics were studied: fresh matter yield, crude protein percentage, flowering time at 2nd cutting, total heiglt of five plants, late—growth during autumn,and ash percentages.
The fresh matter yields of every cutting were measured for 7 years,however, other characters were measured only in a few cuttings throughout the 7—years period.
The collectect data were statistically analysed and the results of comparison of land races and cultivars are as follows:
-Fresh matter yield was significantly different among cultivars in individual cuttings and annual production. The forg.i4 cultivars were better than Iranian cultivars, particularly in the first years of experiment.
—Crude protein percentage was significantly different among cultivars,but there was not a clear aut difference between Iranian and foreign ones.
-Flowering time was significantly diferent among cultivars.The Iranian cultivars were earlier than the foreign ones.
-Plant height was significantly different among cultivars in all measured cuttings. Foreign cultivars we usually heigher than Iranian cultivars.
-Late growth was significaimly different among cultivars.
-Ash percentage was significantly different among cultivars, except in the first few cuttings, however, there was not a clear- cut difference between Iranian and foriegn cultivars for this trait.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
3و4
v.
0
no.
1992
https://jijas.ut.ac.ir/article_16181_cae14e06c488f0864d31f74d2ebfb676.pdf
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زهره حسینی
نژاد
author
سیروس عبد
میشانی
author
text
article
1992
per
Estimates of hetrosis, general and specific combining ability for yield, lint percentage and %2.5 span fiber length obtained from a diallel cross of seven cotton cultivars using method 2, model 1 of Griffing. significant(0.01- level) genotype mean squares, general combining ability(GCA) and specific combining ability(SCA) estimates indicated useful variability for the studied characters. Comparisons of GCA mean squares with the SCA mean squares indicated that greater additive genetic variability was available for the lint percentage than for yield and %2.5 span length. The results showed that the cultivars G. hirsutum had good general combining ability for yield and lint percentage but the GCA was negative for %2.5 span length.The GCA estimates for the cultivars of G. barbadens were negative for yield and lint percentage and positive for %2.5 span length. positive and significat SCA estimates were observed for some parental combinations for yield and lint percentage. Therefore, the cultivars are not suitable as parents for impproving the %2.5 span length. Heterosis, expressed as the deviation of Fl hybrids from mid-parent values was significant for yield and lint percentage for some crosses.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
3و4
v.
0
no.
1992
https://jijas.ut.ac.ir/article_16182_7e39768ed22b34677320c8c27494fa7b.pdf
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سید رضا میرائی
آشتیانی
author
محمود
شیوازاد
author
تقی
قاسمی
author
text
article
1992
per
The use of dried and powdered molasses as a feed ingridient in layer ration was studied during a 12 weeks period from to october 1989, in an experiment using cornpeletly randomized design. The metabo1izable energy content of powdered molasses was estimated and nine isocaloric (2900 Kcal/Kg) diets containing respectively 0,2,4,6,8,10,12,14 and 16 percent of dried molasses were formulated.
Feed intake, egg production egg weight and egg gravity were measured every week. Also correspouding feed efficiencies as measured by Kg. feed consumed per Kg egg produced as well as Kg feed consumed per dozen egg produced were calculated.
The analysis of variance of the data showed highly significant (P
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
3و4
v.
0
no.
1992
https://jijas.ut.ac.ir/article_16183_d462b0b2b827c0a3b5b3d1b7fbd50460.pdf
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علی
نیکخواه
author
مجید متقی
طلب
author
text
article
1992
per
Azolla is an aquatic fern, which is cultivated in many countries as the only crop or mixed with rice. Recently, inGillancultivating and production of this plant is expanding. One aspect of utilaztion of azolla is that, it can be used as a feed source in animal and poultry nutrition.To take into consideration nutritive value of azolla and scrcity of feed in Iran, it was decided to use this plant as a feed stuff in ration of lactating cow, and to stddy its effects on milk yield and its composition
In this study,using a balance—change over design, sixteen lactating Holstein cows with similar condition were selected and allocated into four blocks as a 4x4 Latin square design. The cows were individualy fed four rations including corn foddere, silage and concentrates. The concentrates contained O.O%(A), 15%(B), 25%(C)and35%(D)Azolla. Concentrates were formulated to isocaloric and isonitrogeneous. In the course of study, the cows were milked twice daily and milk weights were recorded. Milk samples were collected twice weekly in each period. Milk samples were analyzed for fat, crude protein (NX 6.38),ash, and total solids. All data were analyzed ststistically.
The obtained results indicated that, the difference, between milk yeilds (Kg) and fat percentages: 12.09. 3.3,11.9, 3.12, 12.5, 3.7 and 11. 79, 3.83, for rations A,B,C and D respectively, were not statistically significant (P< 0.05). This trend also was true for the amount of protein, ash, lactose and total solids. During the course of this research, there was no sign of concentrate unpalatability, metabolic disorder or any illness.
In summary the result of this study, suggestss that it is possible to use Azolla as feed ingredient,up to 35% of ration of lactating cow.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
3و4
v.
0
no.
1992
https://jijas.ut.ac.ir/article_16184_263b20f32befb0c6c29d49f579049b43.pdf
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کاظم ارزانی شمس
آبادی
author
احمد
خلیقی
author
مصطفی
مصطفوی
author
عباس
منیعی
author
پرویز
وجدانی
author
text
article
1992
per
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
3و4
v.
0
no.
1992
https://jijas.ut.ac.ir/article_16185_b32ac88531cb4069e386b22fb1c9fa81.pdf