摘要
在日光温室条件下,采用盆栽试验方法研究了氮磷钾缺乏对4个不同高粱(Sorghum bicolor(L.)Moench)基因型冀蚜2号,T×7000,F44B和7501B的生物学性状、养分吸收以及产量的影响。结果表明,在氮磷钾缺乏条件下,不同高粱基因型株高、光合特性、地上部生物量、养分吸收和籽粒产量均呈现不同程度的下降趋势。与NPK(CK)处理相比,不同高粱基因型NK处理的拔节期株高和抽穗期地上部生物量均显著降低(P<0.05),拔节期F44B在PK,NK和PK处理的株高降幅显著低于其他3个基因型(P<0.05);抽穗期F44B在PK处理和T×7000在NP处理的地上部生物量降幅均显著低于其他基因型(P<0.05)。冀蚜2号、T×7000和7501B在PK和NK处理的光合速率显著(P<0.05)低于CK处理,冀蚜2号和7501B的NP处理显著低于CK处理(P<0.05),F44B在PK和NK处理和T×7000在NP处理的光合速率降幅均显著低于其他基因型(P<0.05)。不同基因型的PK处理N含量、NK处理P含量均显著低于CK处理(P<0.05),其中,F44B降幅显著低于其他基因型(P<0.05)。F44B在PK和NK处理和T×7000在NP处理的单株籽粒质量、穗质量和千粒质量的降幅显著低于其他基因型(P<0.05)。说明不同高粱基因型对氮磷钾缺乏的适应能力存在明显的遗传性差异,将F44B确定为耐低氮、低磷基因型,将T×7000确定为耐低钾基因型。
A pot experiment was carried out to study the effects of biological characters, nutrient uptake and grain yield of four different genotypes （Jiya2, T × 7000, F44B and 7501B） of Sorghum bicolor （L.） Moench with deficiency of N, P and K Under sunlight greenhouse conditions. The results showed that under the deficiency of N, P and K, the plant height, photosynthesis characters, aboveground biomass, nutrient uptake and grain yield of different genotypes of sorghum were shown to some extent a decline trend. Compared with the treatment of NPK（CK）, the plant height and aboveground biomass of the different genotypes sorghum significantly were reduced by P deficiency （P〈 0.05）. The decrease of the percentage of the height of genotype F44B in PK, NK and PK treatments at jointing stage were significantly lower than other three genotypes; the decrease of the percentage of aboveground biomass of genotype F44B in PK treatment and genotype T × 7000 in NP treatment at heading stage were significantly lower than other genotypes. Compared with the NPK treatment, the photosynthetic rate of the genotypes （Jiya2, T × 7000 and 7501B） were significantly declined at treatments of PK and NK （P 〈 0.05 ）, the genotypes （Jiya2 and 7501B ） were significantly reduced at NP treatment （P 〈 0.05 ）. The decreasing amplitude of the photosynthetic rate of the genotype F44B in the treatments of PK and NK and the genotype T ×7000 in NP treatment were significantly lower than other genotypes. Compared with the NPK treatment, the N content in the treatment of PK and the P content in the treatment of NK were significantly reduced with these different genotypes of sorghum （P 〈 0.05 ）, and the decreasing amplitude of genotype F44B were significantly lower than other genotypes. The decreasing amplitude of grain weight per panicle, panicle weight and 1 000-grain weight of the genotypes F44B in the treatments of PK and NK and the genotype T × 7000 in NP treatment were the lowest among genotypes. The results indicated that the adaptability had significant genetic differences in the deficiency of N, P and K among different genotypes of sorghum. F44B genotype was resistant in both nitrogen and phosphorus, T × 7000 genotype was resistant in potassium.
出处
《山西农业科学》
2015年第9期1133-1137,1191,共6页
Journal of Shanxi Agricultural Sciences
基金
国家现代化农业产业技术体系高粱产业技术体系建设专项(CARS-02-03)
关键词
高粱
氮磷钾缺乏
生物学性状
养分吸收
籽粒产量
sorghum
deficiency of N, P and K
biological characters
nutrient uptake
grain yield
