The fertilizer effects of full plastic-film mulching overlying soil and bunch planting of dryland hulless oat

Field plot experiments were employed to investigate fertilizer effects of whole plastic-film mulching overlying soil and bunch planting of dry-land hulless oat(Avena nuda). Compared with no-mulching cultivation(CK), whole plastic-film mulching overlying soil and bunch planting(WFM) increased fertilizer use rate remarkably which lead N, P, K fertilizer use rate to 36.0%, 20.0% and 31.8% , respectively, and increased by 8.2%, 5.7% and 6.4% compared with CK. The techniques of WFM also increased hulless oat fertilizer use efficiency remarkably which lead N, P, K fertilizer use efficiency to 12.0,20.0 and 11.0 kg·kg-1 , respectively, and increased by 29.0%, 39.9% and 25.0% compared with CK. The techniques of WFM also increased the relative-yield of N, P, K nutritional deficiency zone remarkably which lead the relative-yield of N, P, K nutritional deficiency zone to 65.4%,59.6% and 90.5%, respectively, and increased by 11.6%, 9.6% and 4.2 % compared with CK. The techniques of WFM decreased N, P, K fertilizer adherence remarkably which lead N, P, K fertilizer adherence to 34.6%, 40.4% and 9.5%,respectively, and decreased by 25.1%,19.2% and 27.6% compared with CK. Therefore, this technique made a key breakthrough for highly efficient fertilizer utilizing techniques in dryland hulless oat.