甘蔗地埋式滴灌施肥效应

以甘蔗品种新台糖28号为试材,进行不同施肥处理（滴灌施肥、常规施肥＋无滴灌、常规施肥＋滴灌、不施肥＋滴灌）对比试验,探讨地埋式滴灌施肥对甘蔗产量和品质的影响。结果表明,在施肥量相同的条件下,滴灌施肥和常规施肥＋滴灌处理能促进甘蔗早生快发,增加有效分蘖,生长后期能促进甘蔗茎伸长、增粗,提高甘蔗产量,与无滴灌处理相比,分别增产31.9%、22.8%,增收2205.6、78.2元/ha。可见,滴灌施肥应用于甘蔗生产能够获得显著的经济效益,是旱地甘蔗高效节本栽培重要措施之一。

Effects of sub-soil drip fertigation on sugarcane in field conditions

Sugarcane variety ROC28 was used to investigate the effects of sub-soil drip fertigation on yield and quality of sugarcane.Four different fertilization treatments,viz.,drip fertigation,conventional fertilization without drip irrigation,conventional fertilization with drip irrigation and drip irrigation without fertilization were designed in sugarcane field.The fertilizer amount used was as follows： N @ 375 kg/ha,P2O5 @ 195 kg/ha,K2O @ 420 kg/ha,ZnSO4.7H2O @15 kg/ha and borax @15 kg/ha.The treatments of drip fertigation and conventional fertilization with drip irrigation promoted faster and earlier growth of sugarcane,increased number of tillers,improved elongation and widening of stalk at later growth stage,and increased yield with 31.9 and 22.8% with 2205.6 and 78.2 Yuan RMB/ha of income as compared to the conventional fertilization without drip irrigation.Therefore,application of drip fertigation may be recommended as one of important measures for highly effective cost-saving sugarcane cultivation in upland.