摘要
采用核壳包覆式工艺制备出膜材用量为3%、6%、9%的保水型包膜尿素,研究保水型包膜尿素在海南砖红壤中保水缓释效果。结果表明:保水型包膜尿素表面包覆形成了厚度为57.6~191.5μm的保水剂膜层。与普通尿素相比,保水型包膜尿素可减少氮素淋出速率,其首次氮素淋出率显著降低了33.04%~55.48%;随着包膜材料用量增加,保水型包膜尿素的氮素缓释性能逐渐增强。施用保水型包膜尿素可提高砖红壤的保水能力,添加保水型包膜尿素的砖红壤在30 d内土壤水分蒸发率减少7.30%~20.86%,而且增加膜材用量可提高保水型包膜尿素的保水性能。表明保水型包膜尿素在砖红壤中具有较好的保水缓释效果,且可通过调节膜材用量调控其保水缓释性能。
The water-retaining coated urea with 3%,6%,and 9%coating proportions were developed via the core-shell coat-ing process,and the water retention and slow-release properties of water-retaining coated urea in Hainan latosol were studied.The results showed that the surface of the water-retaining coated urea formed a water-retaining agent film with a thickness of 57.6~191.5μm.Compared with ordinary urea,water-retaining coated urea reduced the nitrogen leaching rate,and the initial nitrogen leaching rate was significantly reduced by 33.04%~55.48%.With an increase in the coating material,the nitrogen slow-release performance of water-retaining coated urea was gradually increased.Moreover,the addition of water-retaining coated urea improved the water retention capacity of the latosol,the soil water evaporation rate of latosol with water-retaining coated urea decreased by 7.30%~20.86%within 30 days,and the water retention performance could be improved by increasing the amount of coating material.The water-retaining coated urea demonstrates good water retention and slow-release effects in latosol,and its performance can be regulated by adjusting the amount of coating material,which provides the possibility for promoting the use of water-retaining coated urea in agricultural production in the Hainan latosol region.
作者
张实玉
杨红竹
刘海林
林清火
茶正早
罗微
ZHANG Shiyu;YANG Hongzhu;LIU Hailin;LIN Qinghuo;CHA Zhengzao;LUO Wei(Rubber Research Institute,CATAS/Soil and Fertilizer Research Center,CATAS,Haikou,Hainan 571101,China;College of Tropical Crops,Yunnan Agricultural University,Puer,Yunnan 665000,China;Danzhou Soil Environment of Rubber Plantation,Hainan Observation and Research Station,Danzhou,Hainan 571737,China)
出处
《热带农业科学》
2025年第1期39-44,共6页
Chinese Journal of Tropical Agriculture
基金
中央级公益性科研院所基本科研业务费专项(No.1630022022002)
海南省自然科学基金(No.320QN348)
现代农业产业技术体系建设专项资金项目(No.CARS-33-ZP2)。
关键词
保水型包膜尿素
缓释性能
保水性能
砖红壤
water-retaining coated urea
slow-release performance
water retention performance
latosol
作者简介
第一作者:张实玉(2002-),男,本科生,研究方向为新型肥料研发,E-mail:3089704572@qq.com;通信作者:刘海林(1987-),男,硕士,副研究员,研究方向为新型肥料研发与应用,E-mail:hlliuf@163.com。
