Abstract
Goal. To establish the factors of negative influence of weeds on plants of culture in the process of their joint vegetation. Task: to determine volumes of absorption of compounds of mineral nutrition by weeds.
 Methods. Common and special methods: Field - study of the influence of conditions of cultivation and agro measures on productivity indicators of millet; laboratory - definition of quantitative and qualitative characteristics; statistical - the establishment of mathematical models and statistical dependencies between the investigated factors and processes.
 Results On average, over the years of research, weed plants yielded 95 kg / ha of nitrogen for the density of crops of millet, 50 pct/m2, and the increase in the density of cultivated plants to 100-150 pct/m2 contributed to reducing the removal to 45-32 kg/ha . At the same time, the minimum indices of nitrogen weeds planting on the wheat grassland crops were 200 pct/m2 - 24 kg/ha, respectively. The removal of phosphorus at the density of crops of millet crops of 50 pct/m2 was 57,7 kg/ha of phosphorus, and from an increase in the density of cultivated plants to 100-150 pct/m2, the reduction of the removal was reduced to 27.8-19.9 kg/ha. At the same time, the minimum indices of removal of phosphorous weeds by plants on the crops of millet were the density of 200 pct/m2 - 14.4 kg/ha, respectively.
 Conclusion. The conducted studies allowed to determine that, on average, over the years, weeds of plants per hundred cubic meters of poppy-stalks produced 109 kg/hectare of potassium, while increasing the density of crops to 100-150 pct/m2 contributed to a decrease in take-off to 51.8 -37.1 kg / ha. At the same time, the minimum parameters of the removal of potassium weeds by plants on millet crops were 200 pct/m2 - 27.2 kg/ha respectively
Highlights
Âèíîñ ïîæèâíèõ ðå÷îâèí ç óðîæàoì — âàæëèâèé ïîêàçíèê, Âñòàíîâëåíî, ùî âèíîñ ïîæèâíèõ ðå÷îâèí 3çðóíòó íàâ3òü ïðè â3äíîñíî ìàë3é ÷èñåëüíîñò3 áóð’ÿí3â çíà÷íèé
 ðåçóëüòàò3 íà çàñì3÷åíèõ ïîëÿõ âîëîã3ñòüðóíòó â êîðåíåâì3ñíîìó øàð3 çíèæóoòüñÿ íà 2—5%
Ðàçîì ç âîëîãîþ âîíè ïîãëèíàþòü çðóíòó 3 çíà÷íó ê3ëüê3ñòü ö3ííèõ ïîæèâíèõ ðå÷îâèí [1]
Summary
 ñåðåäíüîìó çà ðîêè äîñë3äæåíü ðîñëèíè áóð’ÿí3â çà ãóñòîòè ïîñ3â3â ïðîñà ïðóòîïîä3áíîãî 50 øò./ì2 âèíîñèëè 95 êã/ãà àçîòó, à îò çá3ëüøåííÿ ãóñòîòè êóëüòóðíèõ ðîñëèí äî 100—150 øò./ì2 ñïðèÿëî çìåíøåííþ âèíîñó äî 45—32 êã/ãà. Çà ãóñòîòè ïîñ3â3â ïðîñà ïðóòîïîä3áíîãî 100 øò./ì2 ë3äåðàìè 3ç çàñâîoííÿ àçîòó çðóíòó áóëè âèäè: ëîáîäà á3ëà — 1,28 ã/ì2, ùèðèöÿ çâè÷àéíà — 1,18, ìèø3é ñèçèé — 0,55, ã3ð÷èöÿ ïîëüîâà — 0,38 òà ã3ð÷àê øîðñòêèé — 0,35 ã/ì2. Ïîäàëüøå çðîñòàííÿ ãóñòîòè ïîñ3â3â ïðîñà ïðóòîïîä3áíîãî çìåíøèëî êàðäèíàëüíî ê3ëüêîñò ñïîæèòîãî ðîñëèíàìè áóð’ÿí3â àçîòó çðóíòó, îäíàê áåççàïåðå÷í3 ë3äåðè 3ç çàñâîoííÿ öüîãî åëåìåíòà æèâëåííÿ çàëèøèëèñü òàêèìè æ ÿê 3 çà ìåíøèõ íîðì âèñ3âó: ëîáîäà á3ëà, ùèðèöÿ çâè÷àéíà, ìèø3é ñèçèé, ã3ð÷èöÿ ïîëüîâà òà ã3ð÷àê øîðñòêèé. Âñòàíîâëåíî, ùî â ñåðåäíüîìó çà ðîêè äîñë3äæåíü ðîñëèíè áóð’ÿí3â çà ãóñòîòè ïîñ3â3â ïðîñà ïðóòîïîä3áíîãî 50 øò./ì2 âèíîñèëè 57,7 êã/ãà ôîñôîðó, à îò çá3ëüøåííÿ ãóñòîòè êóëüòóðíèõ ðîñëèí äî 100—150 øò./ì2 ñïðèÿëî çìåíøåííþ âèíîñó äî 27,8—19,9 êã/ãà. Ïîãëèíàííÿ áóð’ÿíàìè ñïîëóê êàë3þ (Ê2Î) çà ð3çíî¿ ãóñòîòè ðîñëèí ïðîñà ïðóòîïîä3áíîãî, ñåðåäío
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