摘要
为了克服连作障碍,探究了不同浓度烯效唑(S3307)浸种对紫花苜蓿(Medicago sativa)连作胁迫的调控效应。试验以烯效唑[0 (CK)、20、30、40、50、60 mg·L^(-1)]不同梯度溶液浸种8 h处理紫花苜蓿种子后,采取连作土盆栽方式研究了紫花苜蓿生长发育历经60 d时的生物学特征特性及生理生化指标。结果表明:S3307浸种浓度在40mg·L^(-1)时,对连作紫花苜蓿调控效果最佳,显著提高了紫花苜蓿根长、地上及地下生物量以及叶片脯氨酸含量,同时降低了叶片丙二醛含量。S3307浸种能有效缓解连作胁迫带来的不利影响,增加产量,提高苜蓿抗逆性,达到缓解连作障碍的预期效果,为调节连作逆境胁迫提供科学依据。
Continuous cropping of alfalfa(Medicago sativa) is harmful to the plant. To overcome the obstacle of continuous cropping, the regulation effect of soaking seed with different concentrations of uniconazole(S3307) on the continuous cropping stress of Alfalfa was studied. After soaking seeds with different gradient solutions of S3307 [0(CK), 20, 30, 40, 50,and 60 mg·L^(-1)] for 8 h, the biological characteristics, and physiological and biochemical indices after 60 days of growth and development were studied by continuous soil pot culture. The results showed that when the concentration of S3307 was 40mg·L^(-1), it had the highest regulation effect on continuous cropping alfalfa and significantly increased the root length, aboveground and below-ground biomass, and leaf proline content. It also decreased the content of MDA in leaves. S3307 seed soaking can effectively alleviate the adverse effects of continuous cropping stress, increase yield, improve alfalfa stress resistance, achieve the expected effect of alleviating continuous cropping obstacles, and provide a scientific basis for regulating continuous cropping.
作者
刘岳昆
曲善民
陈露
何恩来
张浩
LIU Yuekun;QU Shanmin;CHEN Lu;HE Enlai;ZHANG Hao(College of Animal Science and Technology,Heilongjiang Bayi Agricultural Reclamation University,Daqing 163000,Heilongjiang,China)
出处
《草业科学》
CAS
CSCD
北大核心
2022年第10期2145-2150,共6页
Pratacultural Science
基金
大庆市新能源领域“揭榜挂帅”科技攻关项目(2021BD05)
黑龙江省科技厅省院合作项目(YS16B12)
研究生创新项目“外源添加剂对连作紫花苜蓿生长调节的研究”(YJSCX2021-Y07)。
关键词
生长特性
植物生长调节剂
烯效唑
连作胁迫
生长发育
growth characters
plant growth regulator
uniconazole
continuous cropping stress
growth and development
