新型控释肥机插侧深施对江淮中稻产量及氮肥利用率的影响

Effects of Deep Application of New Controlled Release Fertilizer Machine on Yield and Ni-trogen Use Efficiency of Middle Rice in Jianghuai

基于新型控释肥的机插侧深施肥,可以实现简化施肥次数,减少施肥量,提高肥料利用率。2020年在安徽江淮水稻主产区多点试验的结果表明,基于生物基包膜控释肥(MFi)机插侧深施,江淮杂交中籼稻在常规施肥量(其中N=13.5 kg/667 m^(2))基础上减量20%,江淮常规中粳稻在常规施肥量(其中N=15.6 kg/667m^(2))基础上减量10%,或在常规施肥量(其中N=15.6 kg/667m^(2))基础上减量20%+1次孕穗肥,均可以实现不减产(平产或略增),显著提高肥料利用效率。

Side deep fertilization technology based on the new type of controlled-release fertilizer which can reduce the frequency of fertilization,decrease the amount of fertilization and improve the nitrogen utilization efficiency.Research results in Jianghuai area of Anhui Province in 2020 showed that the amount of fertilization for bio-based controlled-release fertilizer reduced about 20%based on conventional fertilization rate(N=13.5 kg/667 m^(2))in hybrid mid-indica rice,and reduced about 10%based on conventional fertilization(N=15.6 kg/667 m^(2))in conventional mid-japonica rice or that reduced 20%based on conventional fertilization plus once panicle fertilizer both in indica and japonica rice,would not significantly reduce rice yield,but significantly increased nitrogen utilization efficiency.