The impact of progressive cultivation technology on the productivity of coriander on chernozems of the Lower Volga region

Abstract

The data of long-term research on increasing the yield and quality of coriander seeds by selecting the most productive varieties and improving the basic techniques of its cultivation technology are presented. It has been established that the most productive is the Akkord cultivar, which we have bred and released. Biochemical, biological and agrotechnical features of coriander have been studied. High laboratory germination of coriander seeds was revealed (90.1%), and field germination varied from 88.5 - 93.5% depending on the cultivation technology and weather conditions. Low growth rates of coriander were revealed at the beginning of germination and before the branching phase. By the budding and flowering phase, the formation of the leaf surface (46.2 thousand m2/ha) and the accumulation of aboveground green (26.2 t/ha) and dry (3.1 t/ha) biomass reach their peak levels. The maximum yield of coriander seeds was achieved by deep plowing to a depth of 25-27 cm for the Akkord variety - 1.41 t/ha versus 1.20 and 1.14 for the Alekseevskii 413 and Svetlyi cultivars. The greatest amount of essential oil was contained in all studied varieties in the browning phase of the central umbels and the smallest one in the period of filling and ripening of seeds. On average, over the years of research (2015-2018), the highest yield of coriander seeds (1.41 t/ha) was obtained with a skip-row (30 cm) planting and a seeding rate of 2.0 million viable seeds per hectare. With such a seeding rate and planting method, the maximum content of essential oil (1.20%) and fat (20.1%) is provided, which is 15.5-24.7% higher compared to both with a lower seeding rate (0,5 million germinating seeds per 1 ha) and higher one (2.5 million germinating seeds per 1 ha). The same pattern is observed for other sowing methods – line and wide-row planting.