Influences of Some Preceding Winter Crops and Nitrogen Fertilizer Rates on Yield and Quality of Intercropped Maize with Cowpea

Abstract. The purpose of the research was to study the effect of fertilizer rates depending on drainage and weather conditions on the yield and quality of potatoes, their payback with an increase in yield. Methodology and methods of research. The studies were conducted in a two-factor field experiment in 2012–2020, factor A – drainage (drained by closed potter drainage and non-drained soil), factor B – various fertilizer rates (without fertilizers; multi-purpose compost (KMN) 10 t/ha + K90; KMN 10 t/ha + N70K180). The soil of experimental plot of sod-podzolic light loamy are predominant, well-cultivated. Potatoes were cultivated according to the ridge technology developed at VNIIMZ, the predecessor of winter grain crops. According to weather conditions, the years of research are divided into excessively humid, humid and arid. Analyses and observations were carried out according to the generally accepted methods of experimental work, calculations using statistical analysis. Results. The tendencies of changes in the indicators of the water-air regime of the arable layer of soil (moisture, total porosity, porosity of aeration, bulk density) depending on drainage and weather conditions were revealed. The influence of fertilizer rates on drained and non-drained areas, depending on weather conditions, on the content of mineral nitrogen in the soil, yield and its structure, the quality of potato production (content of nitrates, starch in tubers), the use of photosynthetically active solar radiation, payback of fertilizers by an increase in yield has been established. The share of the influence of fertilizers and drainage on the variability of the yield in different weather conditions has been determined. Scientific novelty. The share of the participation of the studied factors in the variability of the potato yield and the rational rates of the use of fertilizers, depending on soil and weather conditions, have been established.

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Tuber Yield and Quality of Two Potato Cultivars in Response to Nitrogen Fertilizer Management

Potato Research ◽

10.1007/s11540-020-09469-7 ◽

2020 ◽

Author(s):

Natália S. Assunção ◽

Adalton M. Fernandes ◽

Rogério P. Soratto ◽

Lydia Helena S. O. Mota ◽

Nathalia P. Ribeiro ◽

...

Keyword(s):

Nitrogen Fertilizer ◽

Tuber Yield ◽

Potato Cultivars ◽

Fertilizer Management ◽

Yield And Quality

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Nitrogen Fertilizer Complements Breeding in Improving Yield and Quality of Milling Oat

Crop Science ◽

10.2135/cropsci2017.05.0290 ◽

2017 ◽

Vol 57 (6) ◽

pp. 3291-3302 ◽

Cited By ~ 3

Author(s):

Weikai Yan ◽

Judith Fregeau-Reid ◽

Bao-Luo Ma ◽

Denis Pageau ◽

Cecil Vera

Keyword(s):

Nitrogen Fertilizer ◽

Yield And Quality

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The effect of non-targeted application of propiconazole on the yield and quality of malt barley

Canadian Journal of Plant Science ◽

10.4141/cjps2011-170 ◽

2012 ◽

Vol 92 (2) ◽

pp. 341-349 ◽

Cited By ~ 1

Author(s):

R. E. Karamanos ◽

N. A. Flore ◽

J. T. Harapiak ◽

F. C. Stevenson

Keyword(s):

N Fertilizer ◽

Yield Potential ◽

Fertilizer Treatment ◽

Fertilizer Rate ◽

Net Returns ◽

Yield And Quality ◽

K Fertilizer ◽

Malt Barley ◽

Fertilizer Rates

Karamanos, R. E., Flore, N. A., Harapiak, J. T. and Stevenson, F. C. 2012. The effect of non-targeted application of propiconazole on the yield and quality of malt barley. Can. J. Plant Sci. 92: 341–349. There is a desire to use non-targeted applications of foliar fungicide to improve malting barley production under higher fertility situations. An experiment was conducted at 80 sites (location by year combinations) with a 12 combinations of N/P/K rate-placement to determine if applications of propiconazole improve malt barley yield and quality under high fertility conditions. Treatment differences for days to maturity were no greater than about 1 d. Fungicide by fertility treatment interactions were not significant (P>0.05). Applications of propiconazole improved yield by 305 kg ha−1 (6%) and plump kernels by 3 g kg−1 (3%) across all fertility treatments, which included N fertilizer rates ranging from 0 to 90 kg N ha−1. The effect of fungicide on yield was greatest at sites with highest yield potentials (ca. 8000 kg ha−1) and was not statistically significant at lower-yielding sites (ca. 3000 kg ha−1). Application of propiconazole also improved net returns [barley revenue – (N cost+propiconazole cost+other operating costs)] by $22 ha−1 with higher barley priced ($190 T−1) and high yield potentials. At sites with low yield potential, the application of propiconazole resulted in net losses of about $7 ha−1 compared with not applying propiconazole. Nitrogen fertilizer rates from 0 to 90 kg N ha−1 (15/30-0 P-K fertilizer treatment combinations) increased yield and protein concentration, and reduced plump kernels in a curvilinear fashion when averaged across fungicide treatments. Net returns were maximized at N fertilizer rates slightly less than 90 kg N ha−1, depending on the price/cost regime. Consequently, malt barley producers will have to consider tradeoffs regarding N fertilizer rate that optimizes yield/returns and kernel quality. Also, decisions regarding fungicide applications and N/P/K fertilizer rate-placement applications can be made independent of each other for malt barley production.

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