PRODUCTIVITY OF VETCH-OAT MIX BY GYPSUM AND GREEN MANURE FERTILIZER APPLICATION ON SALINE SOILS OF CENTRAL YAKUTIA

Abstract

The article describes results obtained from field studies on coherent utilization of saline soils in Central Yakutia. According to scientists data, nonsaline alkaline soils and alkaline soil takes up approximately 30% of the republic’s total cropland area. The territory belongs to sulfur-sodium saline accumulation type. When chemically meliorated by gypsum the soil on 0-40cm layer activates the re-salinization process. With such treatment feeding crops yield was 14.4-20.2 t/ha with gypsum only; with green manure fertilizer at the background- 11,4-16,1 t/ha. Yield increased by 33-64 quintals per hectare, meaning being increased by 20,8-44,4%. By productivity means, vetch-oat mixes in gypsum treatment variant contained 0,66-0,79 feeding units, 94,15-123,11 digestible protein units and 16,78-17,80MJ of gross energy per 1kg of the dry component. Control samples’ exchange energy was 8,13MJ, wherein gypsum treated sample was 9,00-9,53MJ. Improved soil water permeability and aeration facilitated the increase in root uptake of calcium, potassium, phosphorus, and microelements in gypsum treated saline soils. Altogether,  such way of soil treatment is very likely having a positive impact on feeding crops yield in saline soils of Central Yakutia.