【摘要】：通過盆栽試驗,研究了在鎘污染條件下,土壤覆蓋鎘耐性植物(馬唐、鄰近風(fēng)輪菜、車前、揚子毛茛)秸稈對樹番茄幼苗生長及鎘積累的影響。結(jié)果表明:與未覆蓋相比,土壤覆蓋四種耐性植物秸稈均提高了樹番茄根系、莖桿、葉片、地上部分及整株生物量,也提高了樹番茄光合色素含量和抗氧化酶(SOD、POD、CAT)活性。土壤覆蓋馬唐、鄰近風(fēng)輪菜和揚子毛茛秸稈提高了樹番茄地上部分的鎘含量,分別比未覆蓋提高了80.74%、58.09%和28.31%,只有土壤覆蓋車前秸稈的樹番茄地上部分鎘含量低于未覆蓋(較未覆蓋降低了12.25%)。此外,土壤覆蓋馬唐、鄰近風(fēng)輪菜和揚子毛茛秸稈提高了樹番茄的鎘轉(zhuǎn)運系數(shù),但車前秸稈降低了其轉(zhuǎn)運系數(shù)。因此,土壤覆蓋車前秸稈能夠促進樹番茄幼苗的生長,降低其地上部分鎘含量,有利于鎘污染果園中樹番茄的正常生長及安全生產(chǎn)。
[Abstract]:A pot experiment was carried out to study the effects of soil mulched with cadmium-tolerant plant stalks on the growth and cadmium accumulation of tomato seedlings under cadmium-contaminated conditions, such as Maantang, nearby turnip, front of the car, and Ranunculus (Ranunculus). The results showed that soil mulching increased the biomass of root, stem, leaf, aboveground part and whole plant of tree tomato, and also increased photosynthetic pigment content and antioxidant enzyme (SOD,POD,) of tree tomato, compared with that of non-mulching, the straw mulched with soil increased the biomass of root, stem, leaf, aboveground part and whole plant. CAT) activity. The content of cadmium in the aboveground part of the tree tomato was increased by 80.74%, 58.09% and 28.31%, respectively, when the soil was covered with the mulch, nearby rosette and Ranunculus straws increased the cadmium content in the above ground part of the tree tomato. The content of cadmium in the aboveground part of tomato covered with straw was 12.25% lower than that without soil mulching (12.25% lower than that without soil mulch). In addition, the cadmium transport coefficient of tree tomato was increased by soil mulching, nearby rotifer and Ranunculus Yangzi straw, but the front straw decreased its transport coefficient. Therefore, soil mulching with plantain straw could promote the growth of tomato seedlings and reduce the cadmium content above ground, which was beneficial to the normal growth and safe production of tomato in cadmium-contaminated orchard.
【作者單位】： 四川農(nóng)業(yè)大學(xué)園藝學(xué)院;四川農(nóng)業(yè)大學(xué)果蔬研究所;綿陽市農(nóng)業(yè)科學(xué)研究院;
【基金】：四川省科學(xué)技術(shù)廳應(yīng)用基礎(chǔ)項目(2016JY0258)資助
【分類號】：X173;S641.2

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