摘要
基于田间试验，分析了不同保水剂施用量下对玉米水肥利用效率的影响。结果表明，与未施加保水剂处理相比，保水剂施用量为45kg／hm2时。20～60cm土层含水率提高18．31％。O～60cm土层硝态氮、铵态氮和有效磷质量分数分别提高8．7％、16．3％和47．8％，60～120cm土层硝态氮、有效磷和铵态氮质量分数分别降低27．3％、15．7％和22．5％（测试的铵态氮有效数据）；且明显增大根系直径。提高小于0．5cm根长的须根量。其中须根长度、表面积和体积分别提高8．2％、45．5％和202．9％；此外．玉米粗蛋白、粗淀粉、产量分别提高8．5％、1％、20％，粗纤维降低24．2％。
Field experiments were conducted to analyze the effects on water and fertilized use efficiency of corns under different super absorbent polymer （SAP） concentrations. The results showed that compared to treatments without SAP, when SAP concentration was 45 kg/hm2 , soil moisture content of 20~60 cm increased by 18. 31%, contents of nitrate nitrogen, ammonium nitrogen and effective phosphorus in 0~60 cm soil layer increased by 8.7%, 16.3%, 47.8% respectively, while contents of nitrate nitrogen, effective phosphorus and ammonium nitrogen in 60-120 cm soil layer decreased by 27.3%, 15.7% and 22.5%. The length, surface area and volume of fibrous root were improved by 8.2 %, 45.5 %, 202.9 %, corn protein, raw starch yield of corn increased by 8.5 %, 1%, 20 %, and the crude fiber decreased by 24.2 % with SAP concentration of 45 kg/hm2.
出处
《灌溉排水学报》
CSCD
北大核心
2014年第6期141-144,共4页
Journal of Irrigation and Drainage
基金
北京市水土保持工作总站项目
北京市教委专业建设项目
关键词
保水剂
玉米
水分
肥料
super absorbent polymer
corn
water
fertilizer
