The Effect of Digestate from Liquid Cow Manure on Spring Wheat Chlorophyll Content, Soil Properties, and Risk of Leaching

Biogas production from manure and other organic matter, or combinations thereof, is part of the circular economy, use digestate biogas for plant nutrition thus soil fertility restoration carbon (C) sequestration completes economy cycle. The in agriculture one sustainable ways to manage waste, an alternative conventional chemical fertilizers, a means achieve objectives European Green Deal. To this end, two two-factor pot experiments were carried out 2019–2020. Factor A—1. Control (without fertilization), 2. Liquid cow 170 kg ha−1 N (N170), 3. Digested 4. 140 (N140), 5. 110 (N110); B—1. Plants not cultivated, cultivated. determined effect on changes nitrate (NO3-N), ammonium (NH4-N) mineral (NO3-N + NH4-N) nitrogen, available phosphorus (P2O5) potassium (K2O) without plants as well with cultivated evaluated risk migration macronutrients into deeper layers. results showed that application highest allowed rates under Nitrates Directive (N170) N140 accompanied by addition high levels which alters balance (NO3-N) nitrogen soil, extent their These suggest agricultural land enhances and, phosphorus-rich soils, (PO4-P) compounds layers (>25 cm). In order environmental objectives, should be based agrochemical properties needs exceed 65% needed fertilizers.