本文關(guān)鍵詞：隔溝灌溉下水肥供應(yīng)頻率對(duì)芥菜生理與鎘富集特性影響　出處：《農(nóng)業(yè)機(jī)械學(xué)報(bào)》2017年11期 　論文類型：期刊論文

  更多相關(guān)文章： 隔溝灌溉 水肥供應(yīng)頻率 芥菜 鎘富集 土壤重金屬

【摘要】：研究隔溝灌溉下芥菜生物量及重金屬富集與轉(zhuǎn)移特性,對(duì)土壤重金屬污染植物修復(fù)具有重要作用。試驗(yàn)于2014年3月—2015年11月實(shí)施,設(shè)置灌水頻率(I3、I4、I5分別為灌水3、4、5次,灌溉總量為0.15 m)及追肥頻率(基肥0.74 g/m3,施肥總量1.3 g/m3,追肥次數(shù)F0、F1、F2、F3、F4)2因素處理,結(jié)果表明在灌溉頻率影響下,芥菜葉片的超氧化歧化酶活性、脯氨酸隨灌水頻率增加而呈增長(zhǎng),丙二醛呈下降趨勢(shì)。生物量、鎘質(zhì)量比、鎘富集系數(shù)、鎘累積總量I4比I3分別提高12.33%~89.71%、5.00%~44.33%、0.50%~55.36%、22.22%~114.81%;I5比I3提高19.21%~87.37%、24.00%~93.51%、13.44%~112.30%、77.42%~168.75%。其中地上部生物量增幅大于根部,鎘質(zhì)量比、鎘富集系數(shù)和鎘累積總量增幅則根部大于地上部。在施肥頻率影響下生物量、鎘質(zhì)量比、鎘富集系數(shù)和鎘累積總量,高頻施肥(F4)比低頻施肥(F1)分別增長(zhǎng)22.55%~99.71%、30.68%~87.40%、37.80%~112.20%、71.43%~213.51%,且低頻灌溉情況下根部增幅大于地上部,中、高頻率灌溉下地上部大于根部。另外轉(zhuǎn)移系數(shù)隨水肥供應(yīng)頻率增加略有下降,但整體維持較高水平。通過(guò)模型模擬與驗(yàn)證,表明年際間芥菜重金屬修復(fù)能力對(duì)水肥供應(yīng)頻率響應(yīng)趨于一致。
[Abstract]:The biomass and heavy metal accumulation and transfer characteristics of mustard under furrow irrigation were studied, which played an important role in phytoremediation of soil contaminated by heavy metals. The experiment was carried out from March 2014 to November 2015. The frequency of irrigation and the frequency of topdressing (0.74 g / m ~ 3 and 1.3 g / m ~ 3) were set respectively. The results showed that the superoxide dismutase activity and proline activity of mustard leaves increased with the increase of irrigation frequency. Malondialdehyde showed a downward trend. Biomass, CD mass ratio, cadmium enrichment coefficient, total cadmium accumulation I _ 4 were increased by 12.33%, 89.71% and 5.00%, respectively, compared with I _ 3, by 44.33%. 0.50, 55.36 and 22.22, about 114.81; I5 is 19.21% higher than I3, 87.37 and 24.00 and 93.51% higher than I3, 13.44% and 112.30% higher than I3. The increase of aboveground biomass was greater than that of root, and the increase of CD mass ratio, CD enrichment coefficient and total cadmium accumulation was larger than that of shoot. Under the influence of fertilization frequency, biomass was increased. The mass ratio of cadmium, the enrichment coefficient of cadmium and the total amount of cadmium accumulation, F4) increased by 22.55%, 99.71%, 30.68% and 87.40%, respectively, compared with those of low frequency fertilization (F1). 37.80 in the case of low frequency irrigation, the increase of the root was greater than that of the ground, and the increase of the root was higher than that of the ground. Under high frequency irrigation, the upper part of the land is larger than the root. In addition, the transfer coefficient decreases slightly with the increase of water and fertilizer supply frequency, but maintains a high level as a whole. The results showed that the response of heavy metal remediation ability of mustard to the frequency of water and fertilizer supply tended to be consistent.
【作者單位】： 江西農(nóng)業(yè)大學(xué)農(nóng)學(xué)院;江西青年職業(yè)學(xué)院經(jīng)濟(jì)管理系;江西農(nóng)業(yè)大學(xué)國(guó)土資源與環(huán)境學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51469008、41661070) 江西省青年科學(xué)基金重點(diǎn)項(xiàng)目(20171ACB21024) 江西省科技計(jì)劃項(xiàng)目(20151BBF60059) 江西農(nóng)業(yè)大學(xué)研究生創(chuàng)新專項(xiàng)資金項(xiàng)目(NDYC2017-B002)
【分類號(hào)】：S637;X503.231
【正文快照】： 引言在土壤重金屬污染植物修復(fù)領(lǐng)域,印度薺菜作為重要的土壤重金屬修復(fù)植物受到國(guó)內(nèi)外廣泛關(guān)注,主要用來(lái)修復(fù)土壤中鎘、鉛和鋅等重金屬污染,已有研究結(jié)果表明印度芥菜具有顯著的重金屬富集特性且修復(fù)效率較高[1],但受土壤水肥環(huán)境影響下印度芥菜生長(zhǎng)發(fā)育受到抑制,進(jìn)而影響土壤，

本文編號(hào)：1423838