College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China.
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China.
Environ Monit Assess. 2019 May 3;191(6):342. doi: 10.1007/s10661-019-7375-6.
To study the effects of intercropping with accumulator plants on heavy metal accumulation of fruit trees, plants of three Bidens species (Bidens pilosa, Bidens biternata, and Bidens parviflora) were intercropped with Ziziphus acidojujuba seedlings under cadmium (Cd)-contaminated conditions (5 mg kg). Intercropping with Bidens species increased the biomass and chlorophyll b content of Z. acidojujuba seedlings compared with monoculture, but decreased their carotenoid content. Intercropping with Bidens species also improved the activity of superoxide dismutase, peroxidase, and catalase in Z. acidojujuba seedlings compared with monoculture. Intercropping with Bidens species decreased the Cd content in the roots of Z. acidojujuba seedlings compared with monoculture. Conversely, when intercropped with B. pilosa, B. biternata, and B. parviflora, the Cd content in the shoots of Z. acidojujuba seedlings increased by 62.18%, 60.10%, and 62.18%, respectively, compared with that of those monocultured. When intercropped with Z. acidojujuba seedlings, the Cd accumulation amount of three Bidens species plants were ranked B. parviflora > B. biternata > B. pilosa. Therefore, intercropping with plants of three Bidens species is not suitable for Cd-contaminated jujube orchards.
为了研究与富集植物间作对果树重金属积累的影响，在镉（Cd）污染条件下（5mgkg），将三种鬼针草属植物（三叶鬼针草、鬼针草和细叶鬼针草）与酸枣幼苗进行间作。与单作相比，与鬼针草属植物间作增加了酸枣幼苗的生物量和叶绿素 b 含量，但降低了其类胡萝卜素含量。与单作相比，与鬼针草属植物间作还提高了酸枣幼苗中超氧化物歧化酶、过氧化物酶和过氧化氢酶的活性。与单作相比，与鬼针草属植物间作降低了酸枣幼苗根系中的 Cd 含量。相反，当与三叶鬼针草、鬼针草和细叶鬼针草间作时，与单作相比，酸枣幼苗地上部分的 Cd 含量分别增加了 62.18%、60.10%和 62.18%。当与酸枣幼苗间作时，三种鬼针草属植物的 Cd 积累量依次为细叶鬼针草>鬼针草>三叶鬼针草。因此，与三种鬼针草属植物间作不适合 Cd 污染的枣树果园。
