控失尿素、常规尿素及配比对新疆滴灌 玉米产量及氮肥效率的影响.

【Objective】 Effect of fertilization and utilization for drip irrigated maize under plastic film mulching to urea loss-control mix with common urea were compared. ' Method ( One-year field trials were conducted with eight treatments including: (i) CK %(ii) Conventional urea (UREA): N 225 kg/hm2 %(iii) loss-control urea(LCU):N 225kg/hm2 % (iv) 80 'loss-control urea(LCU。8 ): N 180 kg/hm2 % ( v)70 ' loss-controlurea( LCU。8 ) N 157. 5 kg/hm2 % ( vi)70 ' loss-control urea + 30 ' conventional urea( LCU。7 Urea。3 ): Total of N 225 kg hm2 % ( vii)50 'loss-Controurea + 50 ' conventional urea( LCU。5Urea。5 ): Total of N 225 kg/hm2 % ( viii)30 ' loss-control urea + 70 ' conventional urea( LCU。3 Urea。7): Total of N 225 kghm2. The cotton biomass, yield, N uptake and N utilization were measured in the manure period.【Result】（i) Compared with common urea, LCU。7 Urea。3 , LCU。5Urea。5 , LCU could significantly increase the plant dry matters and yield, of which LCU。yUrea。3 had the best effect, the yield was increased by 6. 55 ' - 11 . 77 ' % LCU。8 showed no significant difference %(ii) Compared with common urea, the application of LCU。7Urea。3 , LCU。5 Urea。5 , LCU could significantly increase the nitrogen uptake and N utilization, and the fertilizer nitrogen use efficiency was increased by 7. 96 ' - 12. 09 ' %( ni) Applying controlled-release ure¬a increased the contend of the ammonium nitrogen and nitrate nitrogen in 0 -40 cm soil, LCU。7Urea。3 had the best effect.【Conclusion】 Therefore, the LCU。7 Urea。3 was the most effective way improve the utilization rate and efficiency of nitrogen fertilizer in maize in Xinjiang to [ABSTRACT FROM AUTHOR]

【目的】比较新疆干旱区膜滴灌条件下，控失尿素、常规尿素及不同配比在玉米上的肥效及其利用率的差异。【方法】于 2017年田间试验，共设8个处理:①不施氮肥（CK);②常规尿素（UREA):N 225 kg/hm2;③等氮量控失尿素（LCU):N 225 kg/ 卜？2;%控失尿素减量20%(0〇]。.8):1180/#11?2;1控失尿素减量30%(0〇]。.8):1157.5/#11?2;2控失尿素与常规尿素7: 3配比（0〇10.7^'«10.3):1225 ///11?2;3控失尿素与常规尿素5:5配比（0〇]0.5^'«10.5):1225 ///11?2;4控失尿素与常规尿素3 :7配比（LCU。. 3Urea。. 7):N 225 kg/hm2。在玉米成熟期测定其生物量、产量和氮肥吸收利用率和土壤中铵态氮、硝态氮含量。【结 果】①与常规尿素相比，L〇U. 7化《2 3、L〇U. 5Urea0. 5和LCU均能显著增加成熟期玉米的干物质质量和籽粒产量，其中以L〇U. 7U- rea0. 3增产效果最好，增产6.55 ' ~11.77 %;而L〇U. 8与常规尿素效果相当。②与常规尿素相比，LaV 7Urea0. 3、LaV 5Urea0. 5和 LCU均可显著增加成熟期玉米N素吸收量，同时氮肥利用率增加7.96 ' ~12.09 %。③各控失尿素与常规尿素配比处理,0~40 cm 土层硝态氮、铵态氮含量均高于Urea,且LCU0.7Urea0.3 土壤硝态氮和铵态氮累积量最高。【结论】选择LCU。. 7Urea0.3是新疆滴 灌玉米高产的最佳氮肥管理模式，为产量和氮肥利用率提高的有效途径，可为控失尿素的推广应用提供理论依据。 [ABSTRACT FROM AUTHOR]