摘要
【目的】为优化土壤养分管理,提高胡麻抗倒伏能力。【方法】选用裂区设计,以品种、钾肥和硅肥为主区、副区和副副区因素,探讨了钾硅用量及其耦合对胡麻根系形态及抗倒伏指数的影响。【结果】胡麻根系的形态性状具有显著的种间差异,陇亚11号的根长、根表面积和根体积大于定亚23号。52.5~105 kg/hm^(2)的钾肥用量显著提高了胡麻根系的总长度、表面积和根体积,但抗倒伏指数的增幅较小;硅肥对胡麻根系的形态性状无显著的主效应,但90 kg/hm^(2)的硅肥使抗倒伏指数提升了4.93%~11.91%;胡麻倒伏风险较高的青果期,抗倒伏指数与根系总长度、表面积和根体积极显著正相关。钾硅互作显著影响总根长和抗倒伏指数,低供钾条件下配施硅肥,可增加根系总长度,提高抗倒伏指数。【结论】钾肥显著促进了胡麻根系的生长;硅肥虽不影响根系的形态性状,但显著增强了抗倒伏能力;与试区同等的土壤肥力条件下,52.5 kg/hm^(2)的钾肥配施90 kg/hm^(2)的硅肥,可使胡麻获得较高的抗倒伏能力。
【Objective】In order to optimize soil nutrient management and improve the lodging resistance of oil flax.【Method】Split plot design was used to study the effects of potassium and silicon dosage and its coupling on root morphology and lodging resistance index of oil flax.Variety,potassium fertilizer and silicon fertilizer were used as main factor,split factor and split-split factor respectively.【Result】There were significant interspecific differences in root morphological characters of oil flax,and root length,root surface area and root volume of Longya No.11 were larger than those of Dingya No.23.Potassium fertilizer of 52.5~105 kg/hm^(2)significantly increased total root length,root surface area and root volume,but slightly increased lodging resistance index.Silicon fertilizer had no significant main effect on morphological characters of oil flax root system,but the amount of 90 kg/hm^(2)increased lodging resistance index by 4.93%~11.91%.Lodging resistance index was positively and significantly correlated with total root length,root surface area and root volume in green fruit stage with high lodging risk.Potassium and silicon interaction significantly affected total root length and lodging resistance index,and the application of silicon fertilizer under low potassium supply could increase total root length and improve lodging resistance index.【Conclusion】Potassium fertilizer significantly promoted the growth of oil flax root system.Silicon fertilizer did not affect morphological characteristics of root system,but significantly enhanced lodging resistance index.Under the same soil fertility condition as the experimental area,52.5 kg/hm^(2)potassium fertilizer combined with 90 kg/hm^(2)silicon fertilizer could make oil flax obtain higher lodging resistance.
作者
苟振宇
郭丽琢
高玉红
夏张祥
王月萍
刘亚辉
GOU Zhenyu;GUO Lizhuo;GAO Yuhong;XIA Zhangxiang;WANG Yueping;LIU Yahui(College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China;Gansu Provincial Key Lab of Arid Land Crop Science,Lanzhou 730070,China)
出处
《甘肃农业大学学报》
CAS
CSCD
2022年第1期83-89,97,共8页
Journal of Gansu Agricultural University
基金
国家现代农业特色油料产业技术体系专项“养分管理与高效施肥岗位”(CARS-14-1-16)
甘肃农业大学伏羲杰出人才培育计划“伏羲杰出人才项目”(Gaufx-02J05)
甘肃农业大学干旱生境作物学重点实验室主任基金“胡麻轮作系统不同粒级土壤团聚体与氮素转化利用关联机制”(GSCS-2020-Z6)。
关键词
胡麻
钾肥
硅肥
根系
抗倒伏指数
oil flax
potassium fertilizer
silicon fertilizer
root system
lodging resistance index
