Productivity of short crop rotations and humus state of sod-podzolic soil at different fertilizer systems

Abstract

The purpose. To study influence of traditional organic-mineral, mineral, alternative (ecological) fertilizer systems on productivity of crops and productivity of crop rotations, receipt in soil of organic substance with roots, postharvest residues and collateral products of crops of crop rotations. Methods. Field, laboratory, calculation-comparative, mathematical-statistical. They spent experiments according to conventional procedures in farming agriculture and plant growing. Results. Influence of traditional, mineral, organic and alternative fertilizer systems on productivity of grain and grain-potato short crop rotations is established. Receipts in soil of organic substance with roots, postharvest residues, collateral products and green manure crop mass are established. Influence of fertilizer systems in crop rotations on humus state of sod-podzolic sandy loam soil is specified. Conclusions. In conditions of Left-bank Chernihiv Polissia it is established that grain short crop rotation has ensured on the average on 0,89 t of feeding units/hectare above productivity, than grain-potato. At higher productivity with secondary products and the rooted residues in grain short crop rotation in soil has arrived on the average on 2,5 t/hectares more of organic mass. Thus grain short crop rotation has ensured sufficient balance of humus in conditions of Polissia on sod-podzolic sandy loam soil. The highest productivity in both crop rotations is gained at the alternative fertilizer system (N68P53K60+green manure crop+PP): 6,51 t of feeding units/hectare in grain short crop rotation and 5,53 t of feeding units/hectare in grain-potato, that accordingly on 94,5 and 98,9% is more, than in control.