树脂包膜尿素对温室番茄肥效的观察

Effect of Polythene-coated Urea on Greenhouse Tamato

试验观察了树脂包膜尿素对日光温室番茄的生长、产量、品质及土壤EC值的影响,结果表明:包膜尿素一次全量基施基本可以满足番茄整个生育期的氮素需求,相同产量水平下,包膜肥可以节省15%左右;包膜尿素处理土壤中矿质氮稳定而持久,有利于植株平衡生长,畸形果率和果实硝酸盐含量明显下降;包膜尿素一次性使用,可避免人为加大追肥量而造成土壤盐渍化、EC值过高等问题;养分释放快的(60天型)和较慢者(100天型)两者混用,使土壤中速效氮水平更适合番茄吸收规律,有增产潜力。

The experiment results of the ef fe cts of polythene-coated urea(PCU)on greenhouse tomato’s growth,yield and qu ality of fruit and soil EC showed as follows :compared to common urea(conventi onal applying),PCU applied less15%than normal in N,can achieve the same y ield.PCU can make the min-eral N in the top20cm soil stable and sustainable ,keep plant grow in balance,reduce the rate of mal-formed fruits and nitrate content in them.Single application of PCU as basal fertilizer,also can contr ol the applied quantity of slow-released fertilizers,type100(100-day N release)and type60,is able to produce proper mineral N in soil to meet the tomato need and increase the yield.