番茄碳库强度对其与伴生分蘖洋葱和AMF的关系及钾吸收的影响  

Effects of Carbon Pool Strength on Plant Growth and Potassium Uptake of Tomato Intercropped with Potato-Onion

作　　者：陆建增 周丽颜 黄馨怡 吴凤芝 高丹美 LU Jianzeng;ZHOU Liyan;HUANG Xinyi;WU Fengzhi;GAO Danmei(College of Horticulture and Landscape Architecture,Northeast Agricultural University,Harbin 150030,China)

机构地区：[1]东北农业大学园艺园林学院,哈尔滨150030

出　　处：《园艺学报》2024年第11期2620-2632,共13页Acta Horticulturae Sinica

基　　金：国家自然科学基金青年项目(32102464,32472818);中国博士后科学基金面上项目(2022MD713726);黑龙江省博士后基金面上项目(LBH-Z22004)。

摘　　要：以番茄(Solanum lycopersicum L.)和分蘖洋葱(Allium cepa L.var.aggregatum G.Don)为试验材料,通过分蘖洋葱伴生番茄(四叶一心时定植)盆栽试验,研究番茄遮荫(25%、50%)、去叶(25%、50%)和调整定植苗大小(在番茄子叶展平、番茄两叶一心时定植)3种方式对番茄碳库强度的影响。遮荫和去叶处理均降低了番茄的生长且促进了分蘖洋葱生长,而缩小番茄和分蘖洋葱间的个体差异后,均能促进两者植株生长;削减番茄碳库强度后,番茄与分蘖洋葱的丛枝菌根真菌的丛枝丰度和菌丝侵染率减少,但囊泡丰度增加;番茄去叶和较小定植苗处理后降低了番茄叶片和分蘖洋葱叶片、根系钾含量,提高了番茄根系钾含量,番茄遮荫25%处理提高了分蘖洋葱根系、叶片钾含量,遮荫50%处理提高了番茄叶片、根系钾含量;番茄遮荫和较小定植苗处理对分蘖洋葱土壤速效钾含量没有影响,而去叶和较小定植苗处理使番茄土壤速效钾含量降低并且削减番茄碳库强度,使两者植株可溶性糖含量降低。因此,削减番茄碳库强度减弱了分蘖洋葱对番茄促生作用,且抑制了丛枝菌根真菌在分蘖洋葱伴生番茄系统中的作用效果。A pot experiment was conducted using tomato(Solanum lycopersicum L.)and potato-onion(Allium cepa L.var.aggregatum G.Don)in itercropping system to study the effects of shading(25%,50%)defoliation(25%,50%)and adjusting the size of planted tomato seedlings(tomato seedlings with two cotyledons or with two leaves planted with potato-onion)on carbon pool strength of tomato.Shading and defoliation treatments were found to decrease tomato growth while enhancing the growth of potato-onions.Interestingly,reducing the individual differences between tomato and potato-onion plants promoted the growth of both two plants.Reduction of tomato carbon pool strength reduced abundance of the arbuscular and hypha infection rate of tomato and potato-onion,but increased the abundance of vesicular.The potassium concentration in leaves and roots of potato-onion and the potassium concentration in leaves tomato were decreased,but increasing in roots of tomato instead after defoliation and adjusting the size of plant seedlings.Moreover,the rising concentration of potassium in leaves and roots of the tomato and potato-onion were respectively observed in shading 50%and 25%treatment.Shading and transplanting smaller tomato seedlings did not affect the available potassium content in the soil for potato-onions.Conversely,defoliation and transplanting smaller tomato seedlings reduced the available potassium in the soil for tomato,and weakened the tomato carbon pool strength can lead to a decrease in soluble sugar content in both plants.Overall,the reduction of carbon pool strength in tomato decreased to promoting effects of potato-onion on tomato plant growth,and reduced the role of arbuscular mycorrhizal fungi in the intercropping benifits between potato-onion and tomato system.

关 键 词：番茄 伴生 分蘖洋葱 碳库强度 丛枝菌根真菌 

分 类 号：S641.2[农业科学—蔬菜学]