混种少花龙葵嫁接后代对酸枣幼苗生长及镉含量的影响  

Effects of intercropping with post-grafting generation of two ecotypes of Solanum photeinocarpum on the growth and cadmium content of Ziziphus acidojujuba

作　　者：王茜 鲍欣蕾 邓群仙 王羊 李雷 林立金[3] WANG Xi;BAO Xinlei;DENG Qunxian;WANG Yang;LI Lei;LIN Lijin(College of Horticulture,Sichuan Agricultural University,Chengdu,Sichuan 611130,China;Tea and Fruit Technology Extension Station of Dazhou,Dazhou,Sichuan 635000,China;Institute of Pomology and Olericulture,Sichuan Agricultural University,Chengdu,Sichuan 611130,China)

机构地区：[1]四川农业大学园艺学院,四川成都611130 [2]达州市茶果技术推广站,四川达州635000 [3]四川农业大学果蔬研究所,四川成都611130

出　　处：《湖南农业大学学报（自然科学版）》2021年第4期429-436,共8页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：四川省科学技术厅科技富民强县专项行动计划项目(2012—2014);四川农业大学“双支计划”基金项目(03572783);德阳市科技局重点科学技术研究项目(2018CKJ018)。

摘　　要：在镉(5 mg/kg)污染条件下进行盆栽试验,研究混种农田生态型和矿山生态型少花龙葵嫁接后代对酸枣幼苗生长及镉含量的影响。结果表明:与单种酸枣幼苗相比,混种降低了酸枣幼苗的生物量、株高、可溶性蛋白含量及抗氧化酶活性,其中混种少花龙葵农田本砧嫁接后代的酸枣幼苗生物量降幅最小,根系生物量降低了25.51%,其可溶性蛋白含量及抗氧化酶活性降幅最大,可溶性蛋白含量降低了20.65%,SOD活性降低了20.59%,POD活性降低了35.91%,CAT活性降低了28.16%;混种还降低了酸枣幼苗镉含量、土壤有效态镉含量及土壤过氧化氢酶的活性,其中混种农田本砧的表现最佳,显著降低了酸枣幼苗根系镉含量和土壤有效态镉含量,分别降低了29.60%和16.25%;混种提高了土壤脲酶和蔗糖酶的活性。农田本砧与农田未嫁接相比,根系、地上部生物量分别提高了55.84%、49.23%,镉含量分别提高了31.68%、45.27%,镉积累量分别提高了69.77%、72.18%。农田本砧显著降低了酸枣幼苗根系镉含量、地上部镉含量和土壤有效态镉含量;嫁接提高了少花龙葵对镉的富集能力,少花龙葵本砧嫁接后代富镉能力更强。在镉污染条件下,少花龙葵嫁接后代与酸枣幼苗混种,对酸枣镉污染的修复有明显作用,其中混种农田生态型少花龙葵本砧嫁接后代的效果更好。A pot experiment was carried out to study the effects of two ecotypes(farmland and mine)of Solanum photeinocarpum post-grafting generation on the growth and cadmium(Cd)content of Ziziphus acidojujuba seedlings under Cd contaminated condition(5 mg/kg).The results showed that compared to single cropping intercropping decreased the biomass,plant height,soluble protein content and antioxidant enzyme activity of Z.acidojujuba seedlings.Under intercropping with self-anvilgeneration of farmland ecotype S.photeinocarpum,the decrease of biomass of Z.acidojujuba seedlings was the least and root biomass decreased by 25.51%;the decrease of soluble protein content and antioxidant enzyme activity of Z.acidojujuba seedlings was the biggest:soluble protein content decreased by 20.65%,SOD activity decreased by 20.59%,POD activity decreased by 35.91%and CAT activity decreased by 28.16%.Intercropping also reduced the Cd contents in Z.acidojujuba seedlings,reduced the available Cd content and the catalase activity in soil.Intercropping with farmland ecotype S.photeinocarpum self-anvilgeneration significantly reduced the Cd content in roots,shoots part in Z.acidojujuba seedlings by 29.60%,and significantly reduced the available Cd content in soil by 16.25%.At the same time,intercropping increased the activity of soil urease and invertase activity.The self-anvilgeneration of farmland ecotype S.photeinocarpum significantly reduced the Cd content in roots,shoots part in Z.acidojujuba seedlings and significantly reduced the available Cd content in soil.Grafting increased the Cd enrichment ability of S.photeinocarpum,and self-anvilgeneration of S.photeinocarpum showed the better enrichment effect.Compared to the un-grafting generation,biomass in root and above ground part of self-anvilgeneration of farmland ecotype S.photeinocarpum increased by 55.84%and 49.23%,respectively;while Cd content increased by 31.68%and 45.27%,respectively,and Cd accumulation content increased by 69.77%and 72.18%,respectively.Therefore,under the condition of Cd

关 键 词：少花龙葵 酸枣 镉污染 混种 生物量 

分 类 号：S665.104.6[农业科学—果树学]