喷施拿敌稳调节水稻氮素吸收和生长的研究初探

为了探讨喷施拿敌稳对提高水稻氮素利用、促进水稻生长和增产的影响和作用机理,本文进行了田间小区试验,设计施全N、半N和不施N等施肥条件,比较分析了不同时期喷施拿敌稳对水稻氮素吸收、利用及水稻产量的影响。结果表明,在施氮条件下,于孕穗末期和齐穗期喷施2次拿敌稳,可明显提高叶绿素SPAD值;于水稻孕穗末期和齐穗期时,叶面喷施拿敌稳2次,可明显提高水稻叶面积系数、千粒重、结实率;叶面喷施拿敌稳可明显促进水稻对氮素的吸收,提高氮素利用率,并获得高产。因此可推断：于水稻孕穗末期和齐穗期,叶面喷施拿敌稳可促进水稻生长,明显提高氮素利用率,并可获得较高的水稻产量。

Spraying NATIVO 75% Water Dispersal Granules: Regulation of Nitrogen Absorption and Growth of Rice

The aim is to explore the mechanism and effect on rice growth, nitrogen absorption and utilization efficiency by spraying NATIVO 75% water dispersal granules. In this study, field plot experiments were carried out, fertilization conditions such as total N, semi-N, and non-N were designed, and the effects of spraying NATIVO in different periods on rice nitrogen absorption, utilization, and rice yield were analyzed. The results showed that the chlorophyll SPAD value was significantly increased when spraying NATIVO twice at the end of rice boosting stage and rice full-heading stage under the condition of nitrogen application. At the end of rice boosting and full-heading stage, spraying NATIVO on rice leaf surface twice could significantly increase the leaf area index, the weight of thousands of grains, and the solid seed rate of rice compared with the check. The results also showed that spraying NATIVO on the rice leaf surface could obviously promote the absorption of nitrogen in rice, improve the utilization efficiency of nitrogen, and obtain higher rice yield. In conclusion, spraying NATIVO on the leaf surface at rice boosting and full heading stage can promote the growth of rice, improve the nitrogen utilization efficiency, and obtain higher rice yield.