FORMATION OF PRODUCTIVITY BY VARIETIES OF NARROW-LEAVED LUPINE IN CONTRASTING METEOROLOGICAL CONDITIONS
2019
Agarkova, S.N. | Golovina, E.V. | Belyaeva, R.V.
In 2013, 2014 and 2018 on 6 varieties of narrow-leaved lupine the effect of meteorological conditions on the accumulation and distribution of dry matter due to adaptability was investigated. Determined: the varieties Kristall, Vityaz' and Orlovskij siderat are characterized by an optimal distribution of plastic substances in contrasting moisture conditions. With sufficient moisture supply in these varieties, assimilation processes are more focused on the formation of phytomass. With a lack of moisture, plastic substances are redistributed in the direction of the generative organs, so that in dry conditions the grain yield is higher than in favorable ones. In varieties of lupine the leaf area, optimal for the formation of high grain productivity was determined: 197 cm2/plant or 2,2 m2/m2 with a lack of moisture; 325 cm2/plant or 3,6 m2/m2 with sufficient moisture. Adaptation of lupine plants to dry conditions is to increase the proportion of roots in the plant's phytomass. In conditions of high moisture supply, close positive correlation relations were established between the grain yield and the above-ground mass; between grain productivity, dry matter yield and photosynthetic potential and the number of nodules. In conditions of sufficient moisture supply, a high-level relationship was established between the dry matter yield and leaf area and the photosynthetic potential. Under dry conditions, leaf area and photosynthetic potential negatively correlate with the number of nodules due to competition for plastic substances.
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