Winter Oilseed Rape Yield Depending on Foliar Fertilization

Abstract

Background. An insufficient amount of nutrients in plants results in the disturbance of basic physiological processes, weakens the growth and development of plants, and consequently contributes to a reduction in yield. The aim of this study was to determine the effect of foliar fertilizers containing sulphur, boron and amino acids on the seed yield of three winter oilseed rape morphotypes (Monolit, PX115, PT248).Material and methods. The study was carried out in 2016-2019 at the Zawady Agricultural Experimental Station (52o03' N; 22o33' E) belonging to the University of Natural Sciences and Humanities in Siedlce, in Poland. The field experiment was established in a split-plot design with three replicates. The studied factors were: I – three winter oilseed rape morphotypes: population (cv. Monolit), restored with the traditional growth type (cv. PT248), and restored with the semi-dwarf growth type (cv. PX115); II – types of foliar feeding: 1. The control variant – without foliar feeding and amino acids applied, 2. biostimulant Aminoplant, 3. foliar fertilizer Siarkomag + foliar fertilizer Bormax, 4. foliar fertilizer Siarkomag + foliar fertilizer Bormax + biostimulant Aminoplant.Results. Foliar fertilizers used in the experiment increased the thousand seed weight (on average in the range from 0.9% to 3.4%), seed yield (on average in the range from 2.5% to 18.5%), straw yield (on average in the range from 2.1% to 5.4%) and the harvest index (on average in the range from 4.4% to 7.5%). Of the compared cultivars the semi-dwarf cultivar (PX115) was characterized by the highest yield, while the lowest was from the population cultivar (Monolit). The highest thousand seed weight, main and secondary yields were obtained in the first year of the study which was characterized by a higher total rainfall during seed development and maturation of pods periods compared to the multi-year period, while the lowest levels of these factors was in the vegetation season of 2017–2018 with a humid autumn season and dry period during the flowering and maturation of pods.Conclusion. The most significant increase in the thousand seed weight and seed yield was obtained after applying mixed fertilizers containing sulphur, boron and amino acids. Additional foliar application of the biostimulant Aminoplant on plots with the population and semi-dwarf cultivars did not significantly increase the seed yield as compared to the control. A significant effect of the genetic factor and climatic conditions on the discussed traits has been demonstrated.

Biometric characteristics of winter rape plants (Brassica napus L.) before harvest in the soil and climatic conditions of north-eastern Poland

“…Similar conclusions were reached by Matysiak and Miziniak [ 17 ], who showed that winter rape plants after application of the mixture of Kelpak and Lithovit in the BBCH 32 phase, and twice Lithovit (BBCH 32 and 67) were characterized by an average height of 10–11% higher compared to control plants. Similar results were obtained by Sikorska et al [ 15 ] and Przybysz et al [ 18 ], after using the Asahi SL biostimulant. Sikorska et al [ 16 ] after applying amino acids, sulphur and boron, noted a significant increase in plant height before harvest from 2.3 to 5.5 cm, but the differences between the variants were statistically insignificant.…”

“…This value was higher by 13.7 cm on average compared to the long-stemmed hybrid (Tables 6 and 7 ). However, other authors [ 15 , 16 ] obtained the same height in a restored hybrid with a traditional growth type and population variety. The types of preparation used significantly increased the value of this feature compared to the control variant (Tables 6 and 7 ).…”

“…The thickness of the stem at the base was the greatest in the population morphotype, significantly lower in the semi-catalyst hybrid, and the smallest in the long-stemmed form (Tables 6 and 7 ). Sikorska et al [ 15 ] came to different conclusions, who noted the greatest thickness of the stem at the base in the restored hybrids, and significantly less in the population variety. The value of this feature was the highest after using the preparation with microorganisms.…”

The Effect of Microorganisms and Inorganic Preparations Applied into the Soil and Leaves on the Yield of Winter Rape (<i>Brassica Napus</i> L.)

“…The highest straw yield, on average, 5.79 Mg•ha -1 was obtained in the population cultivar, and the lowest, on average 5.29 Mg•ha -1 in the semi-dwarf hybrid (Table 5). It is consistent with the results of Sikorska et al (2020). The authors also obtained the highest straw yield in the population variety Monolit, and significantly the lowest, on average, by 0.38 Mg•ha -1 in the semidwarf hybrid PX114.…”

Assessment of the Characteristics of Corncobs Used for Energy Needs

“…The starch content after outdoor drying (7.34 ± 0.14% dry matter) is 13.4% higher compared to the starch content obtained in the active ventilation dryer (6.36 ± 0.42% dry matter). In comparison with the studies of other researchers, it was observed that the corncob starch content was only 0.67% ± 0.12% dry matter according to the study by Pointner et al [51], while the variation in maize cob dry matter content ranged from 455 to 524 g according to the study by Szyszkowska et al [52]. Kaliyan and Morey [25] reported the effect of adding raw or pregelatinized starch on the strength and durability of the pellets.…”