Rates and timing of nitrogen fertilizer application on yield, nutritive value and nutrient-use efficiency of early- and late-sown forage maize

摘要: The outcomes of previous studies have resulted in differing recommendations on the rate and timing fertilizer N applications for forage maize. In order to gain an improved understanding role fertilizer, a field experiment was carried out investigate effects time application total plant-fraction yield, nutritive value efficiency nutrient utilization early- late-sown Treatments included two sowing dates (early, late), rates (0, 135 kg ha−1) applied pre-sowing (N1) three 79, 158 kg ha−1) post-sowing (N2) at six-leaf stage (V6). Application N1 (N0 vs. N135) increased dry-matter (DM) stover yield by 11% 7%. N2 N158) grain 44% 34%. also irrigation water-use (WUE) from 30 40 46 61 kg DM ml−1 water respectively. Late DM 6%, but decreased WUE compared with early sowing. results indicate that both is essential maximize maize, V6 recommended when input reduced.