Фотосинтетическая деятельность сортов нута в поливных условиях равнинного Дагестана в зависимости от применяемых агроприемов

Abstract

In the conditions of the Tersk – Sulak subprovincion of the Republic of Dagestan in the period from 2019 to 2021, field experiments were laid. The purpose of the research is to develop an optimal irrigation regime, as well as to identify the effectiveness of the use of the Albit growth regulator on crops of chickpea varieties Volgogradsky 10 (standard), Privo 1, Vega. As a result, it was found that the maximum leaf area on average for the studied varieties was observed under the irrigation regime, which provides for vegetation irrigation with a decrease in the pre-irrigation moisture threshold to 80% HB- 23.9 thousand m2/ha. This is more than the data of the control variant (60% HB) by 10.1%, and the variant with a pre-watering moisture threshold of 70% HB, by 5.3%. Under the irrigation regime with a threshold of 70% HB, the leaf surface was 22.7 thousand m2/ha, the excess with control was 4.6%. Approximately the same situation was also observed for other indicators of photosynthetic activity of varieties. Sufficiently high rates of photosynthetic activity of the varieties were noted during the pre-sowing treatment of seeds with the growth regulator Albit. Among the chickpea varieties studied, the maximum values of leaf surface area and net photosynthesis productivity were formed by the Vega variety. The greatest productivity of the chickpea variety was formed on the variant with a pre-watering threshold of 80% HB. The difference in the yield of the above varieties, compared with the variants 60 and 70% HB, was 34.4; 31.7; 34.5 and 16.8; 15.1; 18.8%, respectively. Of the growth regulators used, Albite turned out to be preferred, and of the studied varieties, Vega.