Growth Response of Wheat to CO
            2
            Enrichment and Different Levels of Mineral Nutrition
            1

Rapeseed has a multifunctional agricultural and environmental value. According to statistics, the growth of acreage occupied by rapeseed in the Russian Federation for 10 years reached 126.8 % or 872.9 thousand ha. The article provides an assessment of spring rapeseed production for oilseeds in the Clearfield system at different levels of mineral nutrition in combination with Ecorost bio-fertilizer in conditions of the Non-Chernozem Zone of Russia. The studies were carried out in 2018–2019 at an experimental agrotechnological station of Ryazan State Agrotechnological University Named after P.A. Kostychev (FSBEI HE RSATU) on gray forest soils. High efficiency of the Clearfield production system has been established. The introduction of N180P120K60 complex for pre-sowing cultivation contributed to the formation of maximum indicators of the rapeseed yield formula and size. The highest yields were shown by Ecorost variants: Kultus KL N180P120K60 (27.8 dt/ha), Cultus KL N180 (27.3 dt/ha), Cebra KL N180P120K60, N180 (24.4 dt/ha), Cyclus KL N180, N90P60K60 (26.6 dt/ha). The maximum profitability of rapeseed oilseeds production was obtained on N180 variant Kultus KL (133.5 %).

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RESPONSE OF APPLE CULTIVARS TO DIFFERENT LEVELS OF MINERAL NUTRITION

Acta Horticulturae ◽

10.17660/actahortic.1997.448.57 ◽

1997 ◽

pp. 317-322

Author(s):

I.V. Dubravina ◽

T.N. Doroshenko ◽

N.I. Kondratenko

Keyword(s):

Mineral Nutrition ◽

Apple Cultivars ◽

Different Levels

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Effects of dietary levels of oxytetracycline on the growth and organ weights of guinea fowl (Numida meleagris)

The Journal of Agricultural Science ◽

10.1017/s0021859600083167 ◽

1988 ◽

Vol 111 (2) ◽

pp. 217-220

Author(s):

Tunde Oguntona

Keyword(s):

Body Weight ◽

Growth Response ◽

Treatment Effects ◽

Reproductive Organs ◽

Guinea Fowl ◽

Visceral Organ ◽

Organ Weights ◽

Numida Meleagris ◽

Male Reproductive Organs ◽

Different Levels

summaryGrowth and visceral organ weights of male guinea fowl (Numida meleagris) given different levels of oxytetracycline have been studied in two experiments. In the first experiment 0, 5·0, 10·0, 15·0 and 20·0 mg oxytetracycline per kg diet were given to male guinea fowl from day 1 to 12 weeks. Body weight showed significant (P < 0·05) increases with incremental levels of the antibiotic up to 10 mg/kg diet. No further increases in growth were recorded with supplementation above this level. There were no treatment effects on the gizzard, lungs and male reproductive organs. Only the heart, liver and intestine weights were significantly (P < 0·05) affected by the treatment, and then only at the highest (20 mg/kg) of the inclusion rates examined. A second experiment was conducted to find out if the growth response obtained with 10 mg/kg oxytetracycline could be produced with a smaller dose. This was achieved at 6·6 mg/kg.

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