摘要
为探寻宁夏引黄灌区春小麦节水栽培的适宜灌水模式,比较分析了6个不同灌水处理(W1:二棱水+开花水;W2:二棱水;W3:拔节水;W4:二棱水+孕穗水;W5:二棱水+拔节水+孕穗水+开花水+灌浆水;W6:二棱水+拔节水+孕穗水+开花水)下春小麦光合性能、物质积累与转运、产量性状及水分利用的差异。结果表明,灌二棱水、孕穗水或开花水的W1、W4、W5、W6处理明显增加春小麦花后旗叶光合速率、蒸腾速率和气孔导度,灌二棱水和生育后期少灌水的W1、W2、W4处理明显增加花后旗叶胞间CO2浓度。灌水次数减少会显著增加旗叶SPAD值,并降低叶面积系数,其中以缺少二棱水的W3处理最为明显。灌有二棱水和孕穗水的W4处理明显降低抽穗至开花旗叶SPAD值,增加开花至灌浆旗叶SPAD值和抽穗至开花叶面积系数,灌开花水明显增加开花至灌浆旗叶面积。灌二棱水、拔节水、孕穗水、开花水明显促进了干物质积累,灌水次数增加明显增加了叶干物质积累量,并降低茎鞘干物质比例;缺少二棱水的W3处理最不利于叶、穗干物质积累,但提高了开花至成熟叶干物质比例;灌浆水对各器官干物质积累影响不明显。二棱期至开花期缺少灌水的W1、W3、W2处理促进了开花前贮藏同化物在花后向籽粒的转运。籽粒产量随灌水次数的增加而增加;缺少二棱水明显降低穗粒数、收获指数,但增加千粒重;增加灌水次数降低了灌水利用效率,且以灌二棱水影响最为明显。综上所述,缺少二棱水对春小麦产量影响最明显,孕穗水、开花水影响次之,灌浆水影响不明显。
In order to screening suitable irrigation mode for water saving cultivation technique of spring wheat in Yellow River Irrigation region in Ningxia, photosynthesis characteristics, dry matter accumu- lation and distribution, grain yield and WUE of wheat were investigated under six irrigation treatments （Wl： irrigation at two stages of double ridge and anthesis; W2： irrigation at double ridge stage; W3： irrigation at jointing stage; W4 ： irrigation at two stages of double ridge and booting; W5 ： irrigation at five stages of double ridge,jointing, booting, anthesis, and filling; W6： irrigation at four stages of double ridge,jointing,booting, and anthesis） through field experiment. The results showed that Wl, W4,W5 and W6 treatments with irrigation at double ridge stage and booting stage or anthesis stage significantly increased photosynthetic rate, transpiration rate and stomatal conductance of spring wheat; and W1, W2, W4 treatments with irrigation at double ridge stage and less irrigation at late growth stage significantly increased intercellular CO2 concentration. Decreasing irrigation times signifi- cantly increased chlorophyll content （SPAD） of flag leaves, decreased leaf area index （LAD ,the most obvious was for W3 treatment with no irrigation at double ridge stage. W4 treatment with irrigation at booting stage significantly decreased SPAD of flag leaves during heading to anthesis stage,and signifi- cantly increased SPAD of flag leaves during anthesis to filling stage, significantly increased LAI from heading stage to anthesis, irrigation at anthesis significantly affecting flag leaf area of spring wheat from anthesis to filling stage. Irrigation at double ridge ,jointing, booting and anthesis stage signifi- cantly promoted dry matter accumulation of spring wheat, increasing irrigation times significantly pro- moted leaf dry matter accumulation, reduced the proportion of dry matter in stem and sheath. Lack of irrigation at double ridge stage significantly decreased dry matter accumulation
出处
《麦类作物学报》
CAS
CSCD
北大核心
2015年第2期198-206,共9页
Journal of Triticeae Crops
基金
宁夏农林科学院科技创新先导资金项目(NkyQ-14-01)
宁夏回族自治区科技支撑项目(2013ZYN227)
国家现代农业产业技术体系建设"宁夏小麦综合试验站"专项
关键词
春小麦
灌水模式
光合性能
干物质积累与分配
籽粒产量
Spring wheat
Irrigation mode
Photosynthesis characteristics
Dry matter accumulation and distribution
Grain yield
