氮肥减施模式对不同穗型迟熟中粳水稻产量及氮素吸收利用的影响  

Effects of Nitrogen Reduction Model on Yield and Nitrogen Absorption and Utilization of Late-maturing Mid-japonica Rice with Different Panicle Types

作　　者：张小祥[1] 邵士梅 赵步洪[1] 张耗 季红娟[1] 肖宁[1] 潘存红[1] 李育红[1] 吴云雨[1] 蔡跃 刘建菊 吉春明[1] 张秀琴[1] 刘广青[1] 周长海[1] 黄年生[1] 李爱宏[1] ZHANG Xiaoxiang;SHAO Shimei;ZHAO Buhong;ZHANG Hao;JI Hongjuan;XIAO Ning;PAN Cunhong;LI Yuhong;WU Yunyu;CAI Yue;LIU Jianju;JI Chunming;ZHANG Xiuqin;LIU Guangqing;ZHOU Changhai;HUANG Niansheng;LI Aihong(Lixiahe Agricultural Research Institute of Jiangsu Province/Co-Innovation Center for Modern Production Technology for Grain Crops,Yangzhou 225007,China;Yangzhou University/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Key Laboratory of Crop Genetics and Physiology,Yangzhou 225009,China)

机构地区：[1]江苏里下河地区农业科学研究所/粮食作物现代产业技术协同创新中心,江苏扬州225007 [2]扬州大学/江苏省作物遗传生理重点实验室/江苏省作物栽培生理重点实验室,江苏扬州225009

出　　处：《中国水稻科学》2022年第3期278-294,共17页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目(32071944);国家现代农业产业技术体系建设专项(CARS-01-60);江苏省重点研发计划资助项目(BE2019343);江苏省农业科技自主创新资金资助项目[CX(19)3060],江苏省自然科学基金资助项目(BK20181214,BK20201219);扬州市社会发展项目(YZ2019050);扬州市现代农业项目(YZ2020032);江苏高校优势学科建设工程资助项目。

摘　　要：【目的】阐明氮肥减施关键时期和适宜减施量对不同穗型迟熟中粳水稻的产量及氮肥吸收利用的影响。【方法】以大穗型品种(丰粳3227)、中穗型品种(淮稻5号)和小穗型品种(扬辐粳8号)为材料,设置12种氮肥处理模式,即不施氮(0N)、当地常规施氮(CN,300 kg/hm^(2))、基肥减总氮10%与20%(BN_(10)、BN_(20))、分蘖肥减总氮10%与20%(TN_(10)、TN_(20))、促花肥减总氮10%与20%(SPN_(10)、SPN_(20))、保花肥减总氮10%与20%(SNN_(10)、SNN_(20))和均衡减氮10%与20%(AN_(10)、AN_(20))。【结果】减氮处理下大穗型品种丰粳3227、中穗型品种淮稻5号和小穗型品种扬辐粳8号产量整体降幅分别为6.17%、7.67%和7.81%,尤以减氮20%降幅最大,其中,丰粳3227、淮稻5号和扬辐粳8号在SPN_(10)、AN_(10)和SSN_(10)处理下产量降幅分别为0.17%、0.79%和0.23%,与CN相比略有下降但差异不显著。在相同减氮模式下,产量降幅最高的为小穗型品种,其次是中穗型品种,最后则为大穗型品种。减氮降低了单位面积有效穗数和每穗粒数,但提高了结实率。减氮处理后有效穗数对大穗型品种丰粳3227的产量促进作用最大,每穗粒数则对中穗型品种淮稻5号和小穗型品种扬辐粳8号产量的贡献最大。减氮处理降低了氮素转运量和穗部氮素积累量,提高了氮素吸收利用率和氮肥偏生产力。减氮模式下大穗型品种丰粳3227、中穗型品种淮稻5号、小穗型品种扬辐粳8号分别在SPN_(10)、AN_(10)、SSN_(10)处理下的氮肥利用效率指标总体优于其他处理。【结论】大穗型品种在促花肥适量减氮、小穗型品种在保花肥适量减氮及中穗型品种均衡减氮处理下达到减氮不减产并提高氮肥吸收利用率。适量减氮能够调节不同穗型水稻群体的生长特性以实现产量稳定,但过量减氮使水稻群体自身的产量调节效应变弱。【Objective】The purpose of this study is to clarify the effects of the key period of reduced nitrogen application and appropriate reduced application rate on the yield and nitrogen absorption and utilization efficiency of late-maturing mid-japonica rice with different panicle types.【Method】Using large panicle cultivar(Fengjing 3227,FJ3227),medium panicle cultivar(Huidao 5,HD5)and small panicle cultivar(Yangfujing 8,YFJ8)as materials,12nitrogen fertilizer treatments were designed,namely zero nitrogen application(0N),local conventional nitrogen application(CN,no nitrogen reduction,300 kg/hm^(2)),basal nitrogen fertilizer reduction by 10%and 20%(BN_(10),BN_(20)),nitrogen reduction by 10%and 20%in tillering fertilizer(TN_(10),TN_(20)),nitrogen reduction by 10%and 20%in flower-promoting fertilizer(SPN_(10),SPN_(20)),nitrogen reduction by 10%and 20%in flower-preserving fertilizer(SNN_(10),SNN_(20))and average nitrogen reduction of 10%and 20%(AN_(10),AN_(20)),to study the effects of different nitrogen reduction modes on yield and nitrogen absorption and utilization of medium-maturing japonica rice varieties differed in panicle type.【Result】Under reduced nitrogen treatment,the overall yield of FJ3227,HD5 and YFJ8decreased by 6.17%,7.67%and 7.81%,respectively,with greater decrease in 20%nitrogen reduction.For FJ3227,HD5 and YFJ8 under the treatment of SPN_(10),AN_(10)and SSN_(10),the yield dropped by 0.17%,0.79%and 0.23%,insignificantly lower than CN.Under the same nitrogen reduction model,the highest yield decline was observed in small panicle variety,followed by medium panicle type variety,and large panicle type variety.Nitrogen reduction reduced the number of effective panicles and the number of grains per panicle,but increased the seed setting rate and1000-grain weight.As a result of nitrogen reduction,the number of effective panicles had the greatest promotion effect on the yield of the large panicle cultivar FJ3227,while the number of grains per panicle contributed the most to the yield of the medium pani

关 键 词：迟熟中粳水稻 穗型 氮肥减施 产量 氮素吸收利用 

分 类 号：S511.22[农业科学—作物学]