中国稻米2025，Vol.31Issue(5)：58-64,7.DOI:10.3969/j.issn.1006-8082.2025.05.009
再生稻头季机收条件下叶面施氮对再生季产量及品质的影响
Eeffects of Foliar Nitrogen Application on Yield and Quality of the Ratoon Crop of Ratoon Rice under Mechanized Harvesting Conditions for the Main Crop
摘要
Abstract
The ratoon crop of ratoon rice,after the mechanical harvesting of the main crop,often faces issues such as low yield and high broken rice rates.Foliar nitrogen application is a simplified fertilization technique that effectively supplements the crop's nitrogen requirements,enhancing both quality and yield.This study investigated the effects of different foliar nitrogen application rates on the growth,yield,and quality of ratoon crop rice,aiming to provide a theoretical basis for achieving high yields through mechanical harvesting and simplified fertilization in ratoon rice production.A field split-plot design with two factors was employed following the main crop rice harvest in both high-fertility(HF)and low-fertility(LF)fields.The main plot factor was rolling status(rolled and non-rolled),and the sub-plot factor was foliar nitrogen application rate,with six nitrogen gradients:0(N0),1.0(N1),3.0(N3),5.0(N5),7.0(N7),and 9.0 kg/hm2(N9).The results showed that,in HF,foliar nitrogen application treatments increased yields by 13.6％-37.4％in rolled areas and 35.1％-39.7％in non-rolled areas compared to N0,with the highest yields in N9 and the lowest in N1.In LF,yields increased by 15.6％-38.8％(rolled areas)and 22.3％-38.6％(non-rolled areas),respectively.Specifically,in the rolled area,the highest yield was observed in N9 and the lowest in Nl,while in the non-rolled area,the highest yield was in N3 and the lowest in N1.Compared to the N0 treatment,foliar nitrogen application improved both milling and appearance quality of the ratoon crop rice to varying degrees.In rolled areas of HF,foliar nitrogen treatments significantly increased milled rice rate and head milled rice rate by 31.6％-37.5％and 65.3％-71.5％,respectively,and significantly reduced chalkiness by 20.4％-35.3％.In non-rolled area of HF,milled rice rate and head milled rice rate increased significantly by 27.2％-32.2％and 46.7％-57.0％,respectively,with chalky grain rate significantly decreased by 22.8％-38.5％.In rolled area of LF,milled rice rate and head milled rice rate increased significantly by 31.8％-37.9％and 53.4％-70.3％,respectively,with chalky grain rate significantly decreased by 20.5％-35.5％.In non-rolled area of LF,milled rice rate and head milled rice rate increased significantly by 34.9％-40.8％and 49.4％-60.2％,respectively,with chalky grain rate significantly decreased by 22.8％-38.5％.Based on the results,the optimal foliar nitrogen application rates for the ratoon crop rice under mechanical harvesting conditions of the main crop were recommended as 4.1 kg/hm2 for rolled areas and 3.0 kg/hm2 for non-rolled areas.关键词
再生稻/机收/尿素/叶面肥/产量/品质Key words
ratoon rice/mechanical harvesting/urea/foliar fertilizer/yield/quality分类
农业科技引用本文复制引用
陈子方,李锦涛,曹玉贤,侯俊..再生稻头季机收条件下叶面施氮对再生季产量及品质的影响[J].中国稻米,2025,31(5):58-64,7.基金项目
长江大学湿地生态与农业利用教育部工程研究中心开放基金(KFG202403) （KFG202403）
湖北省重点研发计划项目(2023BBB082) （2023BBB082）
