功能型叶面肥对水稻产量与品质的影响

摘要

RT螯合肥(含叶肥与果肥)是一种螯合微量元素的功能型叶面肥.为了确定其适宜的施用方法,2015年于湖南浏阳永安开展了不同施氮水平条件下RT螯合肥叶面喷施试验.结果表明:孕穗期和抽穗期喷施叶肥、返青分蘖期喷施叶肥+抽穗期喷施果肥均能明显提高水稻产量和改善米质;返青期喷施叶肥+孕穗期喷施果肥对产量的提高效果最显著;秧苗期喷施叶肥+分蘖期喷施叶肥+抽穗期喷施果肥对改善米质效果最好;秧苗期喷施叶肥能显著提高总根数和干物质的积累;在N肥减量条件下配施叶面肥有显著提高肥效的作用.该叶面肥在孕穗期和抽穗期喷施,且叶肥混搭果肥喷施后效果更显著.%RT chelated fertilizer is a functional foliar fertilizer-with multiple chelated trace elements,which includes both foliar fertilizer and fruit fertilizer.In order to determine the suitable spraying way,field experiment with foliar fertilizer spraying at different N level was conducted in 2015.The results were as follows:the rice yield and quality were improved when the fertilizer sprayed at booting stage and heading stage,and also when sprayed at returning green stage and booting stage.The yield was improved prominently when the foliar fertilizer sprayed at returning stage and spraying fruit fertilizer at booting stage.The rice quality was improved greatly when the foliar fertilizer sprayed at seedling stage and tillering stage,and plus fruit fertilizer.The total number of roots and dry matter accumulation were improved when foliar fertilizer sprayed at seedling stage.Foliar fertilizer improved fertilizer efficiency at low N level.In conclusion,the best spraying date were booting stage and heading stage,and when foliar fertilizer and fruit fertilizer sprayed together showed the best effect.