[Objectives]To investigate the performance of different efficiency-enhanced Diammonium phosphate(DAP)fertilizers in Xinjiang soils and identify new low-nutrient DAP formulations that promote maize growth in the region...[Objectives]To investigate the performance of different efficiency-enhanced Diammonium phosphate(DAP)fertilizers in Xinjiang soils and identify new low-nutrient DAP formulations that promote maize growth in the region.[Methods]Using 64%DAP(additive-free high-nutrient fertilizer)as the control,it compared with low-nutrient fertilizers:57%DAP additive Formula A,57%DAP additive Formula B,57%DAP additive Formula C,57%DAP additive Formula D,57%DAP additive Formula E,and 57%DAP additive Formula F.By measuring maize growth morphology,physiological indicators,and biomass under different treatments,the measured parameters were evaluated using statistical methods such as regression analysis.[Results]The addition of enhancing additives can promote root development in maize plants and increase physiological indicators such as chlorophyll content and plant height.Low-nutrient DAP with additives shows a trend of being superior to high-nutrient DAP fertilizers in promoting maize growth.Different additive formulas exert varying effects on maize,with 57%DAP additive Formula A,57%DAP additive Formula E,and 57%DAP additive Formula F demonstrating positive effects on maize promotion.[Conclusions]This study provides practical guidance for DAP selection and application in Xinjiang maize cultivation while establishing a foundation for cutting-edge research on high-utilization,low-nutrient fertilizers in arid regions.展开更多
Sue Bredekamp教授是美国华盛顿康奈尔学院（弗农山）人类发展与儿童教育系教授，曾担任全美幼教协会董事、开端计划发展规划局顾问、美国国家研究委员会委员、国家科学院早期数学教育委员会委员等，主要研究领域为早期读写、课程、教...Sue Bredekamp教授是美国华盛顿康奈尔学院（弗农山）人类发展与儿童教育系教授，曾担任全美幼教协会董事、开端计划发展规划局顾问、美国国家研究委员会委员、国家科学院早期数学教育委员会委员等，主要研究领域为早期读写、课程、教学以及教师专业发展，同时还从事早期教育机构的教学和指导、在社区大学培训儿童保教工作者等工作。1981年到1998年，她作为全美幼教协会资格认证与专业发展部主任，撰写了《0～8岁早期教育中的发展适宜性课程》一书。展开更多
基金Supported by National Key R&D Program of China during the 14 th Five-Year Plan Period"Development and Industrialization of New Green Value-Added Fertilizers"(2023YFD1700200).
文摘[Objectives]To investigate the performance of different efficiency-enhanced Diammonium phosphate(DAP)fertilizers in Xinjiang soils and identify new low-nutrient DAP formulations that promote maize growth in the region.[Methods]Using 64%DAP(additive-free high-nutrient fertilizer)as the control,it compared with low-nutrient fertilizers:57%DAP additive Formula A,57%DAP additive Formula B,57%DAP additive Formula C,57%DAP additive Formula D,57%DAP additive Formula E,and 57%DAP additive Formula F.By measuring maize growth morphology,physiological indicators,and biomass under different treatments,the measured parameters were evaluated using statistical methods such as regression analysis.[Results]The addition of enhancing additives can promote root development in maize plants and increase physiological indicators such as chlorophyll content and plant height.Low-nutrient DAP with additives shows a trend of being superior to high-nutrient DAP fertilizers in promoting maize growth.Different additive formulas exert varying effects on maize,with 57%DAP additive Formula A,57%DAP additive Formula E,and 57%DAP additive Formula F demonstrating positive effects on maize promotion.[Conclusions]This study provides practical guidance for DAP selection and application in Xinjiang maize cultivation while establishing a foundation for cutting-edge research on high-utilization,low-nutrient fertilizers in arid regions.
文摘针对DAP-4摩擦感度较高的特点,采用非水溶剂的原位包覆方法,以微晶蜡(microcrystalline wax,MW)为包覆层,制备DAP-4/MW复合物。对DAP-4包覆前后的形貌和结构进行表征,分析DAP-4/MW复合物的热分解行为,并对其感度性能进行测试。结果表明:MW可很好地包覆在DAP-4表面;MW的原位包覆使DAP-4的初始热分解温度提前,当MW含量从1%增加到5%时,DAP-4在不同升温速率下的分解温度均呈现下降趋势,活化能(nergy of activation,Ea)呈先降低后增加趋势,少量加入MW可降低DAP-4的Ea;当MW原位包覆含量为5%时,样品DAP-4/MW 5%的摩擦感度(20%)和撞击感度(0)较DAP-4的摩感(100%)撞感(15%)显著降低,微晶蜡的原位包覆可有效提升DAP-4的安全性。
