双季稻区不同晚稻品种氮肥利用率比较  

Comparison of Nitrogen Use Efficiency Among Different Late Rice Varieties in Double-Season Rice Region

作　　者：段红霞[1] 周晓丰 夏桂龙[1] 杨延安 DUAN Hong-xia;ZHOU Xiao-feng;XIA Gui-long;YANG Yan-an(Dengjiabu Rice Foundation Seed Station of Jiangxi Province,Yujiang 335200,PRC;Agricultural Technology Extending Stations of Zhongling Town in Jinxian County,Jinxian,331717,PRC)

机构地区：[1]江西省邓家埠水稻原种场,江西余江335200 [2]进贤县钟陵农业技术推广综合站,江西进贤331717

出　　处：《湖南农业科学》2020年第9期29-31,共3页Hunan Agricultural Sciences

基　　金：国家重点研发计划项目(2016YFD0200101)。

摘　　要：长期以来由于氮肥使用不合理以及土壤特有的理化性质,南方丘陵地区水稻产量常处于中低产水平,为了解决这一问题,以南方主推的8个晚稻品种为试材,通过设置不施氮和正常施氮2个处理,考察各品种的叶绿素含量(SPAD值)、产量和氮肥利用率等指标,以期筛选适宜的高产高效水稻品种。结果表明:与不施氮肥相比,施用氮肥处理均可以显著增加各水稻品种齐穗期剑叶的SPAD值和产量,但各品种的表现不一;在正常施氮条件下,万象优华占和野香优2号的剑叶SPAD值最高,天优华占和万象优华占的产量最高,天优华占和万象优华占的氮肥偏生产力和农学效率也表现出较高的趋势。因此,综合来看天优华占和万象优华占这2个品种适宜在南方丘陵区作晚稻推广种植。Rice yield in the hilly area of South China has been at the low-middle level for a long time due to irrational use of nitrogen fertilizer and the unique physical and chemical properties of soil.In order to solve this problem,eight late rice varieties mainly promoted in South China were used as test materials,and chlorophyll content(SPAD value),yield and nitrogen use efficiency of each variety were measured by setting two treatments(no nitrogen application and normal nitrogen application)so as to screen suitable rice varieties with high yield and high nitrogen use efficiency.The results showed that the SPAD value of flag leaves at full heading stage and grain yield of each variety with nitrogen fertilizer application were significantly higher than those without nitrogen application,but there was some difference between eight varieties;under nitrogen application conditions,the SPAD values of flag leaves in Wanxiangyouhuazhan and Yexiangyou 2 were significantly higher than the others.Meanwhile,the yields of Tianyouhuazhan and Wanxiangyouhuazhan were the highest;further analysis revealed that Tianyouhuazhan and Wanxiangyouhuazhan also had relatively high partial factor productivity and agronomic efficiency of nitrogen fertilizer.Therefore,for the late rice cultivation in the southern hilly areas,Tianyouhuazhan and Wanxiangyouhuazhan are suitable varieties with high yield and high efficiency.

关 键 词：晚稻 氮肥 品种筛选 南方丘陵区 

分 类 号：S511[农业科学—作物学]