Ecological and agrochemical efficiency of lignohumate in rice agrocenosis (Oryza sativa L.)

The aim of this work was to evaluate the ecological and agrochemical efficiency of treating rice plants with lignohumate.

The field experiment was located in the rice irrigation system of the left bank of the Kuban (Republic of Adygea). The experimental design included control (without fertilizers), application of N₁₂₀P₈₀K₆₀ fertilizers (background) and variant treatments of rice plants with an aqueous solution of lignohumate against a background of N₁₂₀P₈₀K₆₀. Rates of preparation of 125, 250, 500, 750 and 1000 ml/ha were studied. The ecological and agrochemical efficiency of lignohumate in the rice agrocenosis was assessed by measuring the consumption of nutrients by plants during their growth and development, the removal of nutrients by the crop and the coefficients of their use by rice from the applied fertilizers. 

Treatment of rice agrocenosis with lignohumate increased: the average daily (on average throughout the growing season) consumption of nitrogen, phosphorus and potassium by rice by 9.0‒22.2 %, 11.9‒23.9 and 9.9‒23.2 %; removal of nutrients by the crop by 3.1‒13.1 %; 6.1‒14.8 and 3.9‒13.9 %, and the coefficients of their use by plants from fertilizers by 2.7‒11.5 %, 3.8‒9.3 and 7.8‒27.7 %, respectively, in relation to the

N₁₂₀P₈₀K₆₀ background. 

The ecological and agrochemical efficiency of lignohumate is more pronounced when treating rice plants at the rate of 750 ml of the preparation per hectare of sowing. At this rate, the average daily absorption of nitrogen, phosphorus and potassium by rice increases by 22.2 %, 23.9, 23.2 %, their removal by the crop by 13.1 %, 14.8 and 13.9 % and the use of elements by plants from fertilizers by 11.5 %, 9.3 and  27.7 %, respectively.

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