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YIELD AND QUALITY OF FORAGE MAIZE AS INFLUENCED BY PLANT DENSITY AND NITROGEN RATE

Emine BUDAKLI ÇARPICI, Necmettin ÇELIK, Gamze BAYRAM

Abstract

The producers of silage maize need more information on agronomic managements such as plant density and nitrogen fertilization. Field studies were conducted in Bursa to evaluate dry matter yield and forage quality responses of silage maize to plant density and nitrogen rate. Five densities of 60 000, 100 000, 140 000, 180 000 and 220 000 plants ha-1 and five rates of 0, 100, 200, 300 and 400 kg N ha-1 were applied with split block design of three replications. As plant density increased, dry matter yield, stem percentage and ADF increased, but leaf number plant-1, stem diameter and ear percentage decreased with the highest dry matter yields of 180 000 plants ha-1 and 220 000 plants ha-1. However, there were no effects of plant densities on plant height, leaf percentage, crude protein and NDF. The dry matter yield, plant height, leaf number plant-1, stem diameter, leaf percentage, ear percentage, crude protein content and NDF responded linearly to nitrogen rates with the highest dry matter yields at 300 and 400 kg N ha-1, respectively. However, stem percentage decreased and ADF did not change as nitrogen rates increased. In conclusion, 180 000 plants ha-1 and 300 kg N ha-1 may be recommended for cultivation of silage maize under drip irrigation at Southern Marmara Region.

Keyword: Dry matter yield, forage quality, nitrogen rate, plant density, Zea mays L. ,

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.

Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding

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YIELD AND QUALITY OF FORAGE MAIZE AS INFLUENCED BY PLANT DENSITY AND NITROGEN RATE

Abstract

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Abstract

The Journal includes only the original research papers about breeding and genetics, agronomy, physiology, forage crops, medicinal and aromatical plants, biotechnology and utilization.

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