Fertilization recommendation for late rice based on “3414” field trials in Ji’an, Jiangxi Province | 基于“3414”试验的江西省吉安市晚稻施肥效果及推荐肥料用量

Chinese. 2008-2010年在江西省吉安市13个县（市、区）开展42个＂3414＂晚稻田间肥效试验。结果表明：各试验点土壤有较高的土壤碱解氮含量（116～209 mg/kg）,但相对产量（60%～85%）较低,施用氮肥增产效果显著,推荐施氮量为110～210 kg/hm2;试验区土壤速效钾含量为61～119 mg/kg,相对产量为85%～100%,按土壤速效钾丰缺指标划分为中高等级,施用钾肥有较好的增产效果,推荐施钾量为0～130 kg/hm2;试验区土壤有效磷含量为11～31 mg/kg,相对产量为85%～100%,按土壤有效磷丰缺指标划分为中高等级,推荐施磷量为0～80 kg/hm2,施用磷肥效果低于氮肥和钾肥。

English. To use chemical fertilizers rationally,reduce the resources waste and enhance fertilization efficiency,42 ＂3414＂ field experiments for late rice were conducted in 13 counties and regions in Ji′an city,Jiangxi Province from 2008 to 2010 to study the effect of soil testing and formulated fertilization on rice production.The results showed that the relative yield of late rice was 60%-85% when soil alkali-N content ranged from 116 mg/kg to 209 mg/kg.The recommendation of fertilizer N rate for late rice was 110-210 kg/hm2.The relative yield of late rice was 85%-100% when soil available K content ranged from 61 mg/kg to 119 mg/kg,indicating applying potassium fertilizer could improve yield.The recommended amount of K fertilizer application was 0-130 kg/hm2.There were high soil available P content and relative yield of late rice in the experimental regions,which were 11-31 mg/kg and 85%-100%,respectively.Fertilizing quantity recommended for P was 0-80 kg/hm2.The effect of P fertilizer was inferior to N and K.The recommended nitrogen fertilizing level calculated according to the high soil alkali-N content and low relative yield of late rice was relatively high.