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采用田间小区试验,研究了不同区域配方肥对湖南省洞庭湖流域晚稻生长、养分累积及产量的影响。结果表明:施用大区域配方肥对晚稻生长发育有良好促进作用,株高、分蘖、SPAD值有明显增加;在灌浆-收获期施用大区域配方肥较农民习惯施肥处理的水稻植株氮、磷、钾养分累积分别提高11.68%~3.49%、35.29%~55.01%、19.6%~15.94%;大区域配方肥模式下晚稻产量最高,较农民习惯施肥增产500 kg/hm2,增产率达4.6%。因此湘阴试验区大区域配方肥可代替农民惯用施肥;3种施配方肥处理间相比,在大区域配方肥的基础上,适当降低氮肥用量,并辅以磷、钾调控是完全可行的。
Field experiments were conducted to study the effects of different formula fertilizers on growth, nutrient accumulation and yield of late rice in Dongting Lake basin of Hunan Province. The results showed that the application of large-area formula fertilizer had a good effect on the growth and development of late rice, the plant height, tillering and SPAD value increased obviously. During the grain filling and harvesting period, The accumulation of potassium increased by 11.68% -3.49%, 35.29% -55.01% and 19.6% -15.94%, respectively. The yield of late rice was the highest in the mode of formula fertilizer in large area, increased by 500 kg / hm2 than that of peasants and the rate of increase was 4.6%. Therefore, the large area of Xiangyin experimental area can replace the conventional fertilization of peasants fertilization; compared with the three kinds of application of fertilizer on the basis of the formula fertilizer in large areas, appropriate to reduce the amount of nitrogen, supplemented by phosphorus and potassium regulation is entirely feasible .