Mulching with crop straws influences cadmium accumulation of Cyphomandra betacea seedlings

Abstract

Mulching with plant straws on cadmium (Cd) contaminated soil can reduce Cd accumulation in crop plants. In this pot experiment, Cd‐contaminated soil was mulched with the straw of rice, wheat, rape, or broad bean, and their effects on the growth and Cd accumulation of Cyphomandra betacea seedlings were studied. Mulching with the straw of rice or broad bean increased the root, stem, leaf, and shoot biomasses of C. betacea seedlings, and increased the chlorophyll contents in leaves of C. betacea seedlings, whereas mulching with the straw of wheat or rape decreased this growth and photosynthetic pigment parameters. The Cd contents in the roots, stems, leaves, and shoots of C. betacea seedlings decreased in response to mulching with rice straw by 32.79%, 19.40%, 14.04%, and 14.86%, respectively, and decreased following mulching with rape straw by 12.27%, 18.22%, 6.89%, and 9.13%, respectively, compared with those of the control. Mulching with the straw of wheat or broad bean increased the Cd contents in C. betacea seedlings. Therefore, rice straw promoted the growth of C. betacea and significantly reduced the Cd uptake by C. betacea, which was beneficial for safe production of C. betacea in Cd‐contaminated orchards. © 2019 American Institute of Chemical Engineers Environ Prog, 38: e13229, 2019

Effects of applying Bidens species straw to Cd‐contaminated soil on growth and cadmium accumulation of Ziziphus Acidojujuba seedlings

“…betacea seedlings, but mulching with G. parviflora, wheat and rape straw significantly decreased the biomass. 16,36 This showed that different accumulator plant straw can have different effect on growth of the same plant. In this study, applying B. biternata straw increased the biomass of Z. acidojujuba seedlings, while applying B. pilosa straw decreased the biomass, applying B. parviflora straw just increased the root biomass.…”

The Effects of Tea on Cadmium Accumulation for the Emergent Accumulator Plant <i>Nasturtium officinale</i>

“…Under heavy metal contaminated soil, it is important to adjust plant heavy metal absorption by changing the external environment, which is important for alleviating the heavy metal stress on the plants [37]. Certain studies showed that adding straws from different crops to soil reduced the heavy metal uptake of plants [37,38].…”

“…Under heavy metal contaminated soil, it is important to adjust plant heavy metal absorption by changing the external environment, which is important for alleviating the heavy metal stress on the plants [37]. Certain studies showed that adding straws from different crops to soil reduced the heavy metal uptake of plants [37,38]. For hyperaccumulators or accumulators, certain plant straws (such as Youngia erythrocarpa and Cardamine hirsuta) promoted the Cd uptake of the Cd-hyperaccumulator Galinsoga parviflora and the Cd-accumulator Capsella bursa-pastoris, while other plant straws inhibited these properties [8,35,36,[39][40][41].…”