College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Rice and Sorghum Research Institue, Sichuan Academy of Agricultural Sciences, Deyang, Sichuan, China.
Environ Sci Pollut Res Int. 2023 Jan;30(2):4744-4753. doi: 10.1007/s11356-022-22381-6. Epub 2022 Aug 16.
Intercropping can affect the growth and elemental absorption of vegetables. This study investigated the physiology and cadmium (Cd) content of pakchoi (Brassica chinensis L.), lettuce (Lactuca sativa L. var. ramosa Hort.), and radish (Raphanus sativus L.) seedlings under monoculture, mutual intercropping of two or three varieties. Intercropping is not conducive to the accumulation of chlorophyll and biomass content of pakchoi, lettuce, and radish. When three seedlings were intercropped together, the antioxidant enzyme activity of pakchoi, lettuce, and radish increased and the content of malondialdehyde decreased, except that the superoxide dismutase activity of radish is inferior to the value of radish and pakchoi intercropping. Intercropping increased the soluble sugar and proline content in the lettuce seedlings, while those in the radish and lettuce seedlings reduced or had no significant effect. When intercropped with pakchoi and lettuce, the Cd content in the roots and shoots of pakchoi is higher and lower, respectively. At the same time, root or shoot bio-concentration factors also performed the same trend, and TF was the smallest and less than 1; however, the TF of lettuce is greater than 1. When intercropping with pakchoi or lettuce separately or together, it promoted the accumulation of Cd in radish root; when intercropping with pakchoi, the value of TF was the smallest. From the antioxidant system, the performance of the three seedlings intercropped together is better than the two; however, the accumulation of Cd shows the opposite trend, and the participation of cabbage in the intercropping is relatively conducive to reducing the Cd content in the edible parts.
间作对蔬菜生长和元素吸收的影响。本研究调查了单作、两种或三种品种互作条件下小白菜（ Brassica chinensis L.）、生菜（ Lactuca sativa L. var. ramosa Hort.）和萝卜（ Raphanus sativus L.）幼苗的生理特性和镉（ Cd ）含量。间作不利于小白菜、生菜和萝卜叶绿素和生物量的积累。当三种幼苗间作时，小白菜、生菜和萝卜的抗氧化酶活性增加，丙二醛含量降低，除萝卜的超氧化物歧化酶活性低于萝卜与小白菜间作的值外。间作增加了生菜幼苗中的可溶性糖和脯氨酸含量，而萝卜和生菜幼苗中的含量降低或没有显著影响。当与小白菜和生菜间作时，小白菜根和地上部分的 Cd 含量分别较高和较低。同时，根或地上部分的生物浓缩系数也表现出相同的趋势， TF 最小且小于 1；然而，生菜的 TF 大于 1。当与小白菜或生菜单独或一起间作时，它促进了萝卜根中 Cd 的积累；当与小白菜间作时， TF 值最小。从抗氧化系统来看，三种幼苗的间作表现优于两种幼苗的间作；然而， Cd 的积累却呈现出相反的趋势，白菜的参与相对有利于降低可食用部分的 Cd 含量。
