文章摘要
三种纳米材料对水稻幼苗生长及根际土壤肥力的影响
Effects of three nanomaterials on growth and rhizospheric soil fertility of rice seedling
投稿时间:2019-05-15  修订日期:2019-05-15
DOI:
中文关键词: 纳米材料  水稻  植物生长  土壤养分  土壤酶
英文关键词: nanomaterials  rice  plant growth  soil nutrients  soil enzymes
基金项目:
作者单位E-mail
尹勇 广西师范大学 502881579@qq.com 
刘灵 广西师范大学 liuling@mailbox.gxnu.edu.cn 
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中文摘要:
      为了探讨纳米材料在土壤环境中生态效应,本研究将三种外源纳米材料(nSiO2、nTiO2、nZnO)分别添加到水稻土中,探讨了三种浓度的纳米材料对盆栽水稻幼苗生长及土壤肥力的影响。研究结果表明:0.5 mg/g nZnO处理后水稻幼苗鲜重、干重和株高增加,但1、2 mg/g nZnO处理后水稻鲜重、干重和株高降低;2 mg/g nSiO2处理后水稻干重和株高显著降低。0.5、2 mg/g nSiO2处理后的水稻N含量显著降低,三种浓度nZnO处理后的水稻P含量显著增加,而K含量显著降低。1、2 mg/g nTiO2处理对水稻生长、主要营养元素(N、P、K)含量以及土壤有效氮、有效磷、有效钾含量的影响均不显著。经三种浓度nSiO2和nTiO2处理后土壤pH和有机质含量都降低,1、2 mg/g nSiO2处理后土壤有效氮和有效磷含量显著增加,三种浓度的nZnO处理后土壤有效磷和有效钾含量降低。经三种纳米材料处理后土壤酸性磷酸酶和过氧化氢酶活性分别被显著抑制和显著促进,不同浓度的nZnO处理土壤蔗糖酶和脲酶活性都被显著抑制。总体而言,三种纳米材料中nZnO对植物的生长、养分吸收和土壤酶活性的影响最大。
英文摘要:
      In order to explore the ecological effects of nanomaterials in the soil environment, three exogenous nanomaterials (nSiO2, nTiO2 and nZnO) were added to the paddy soil of potted rice seedlings respectively, and the effects of three kinds of nanomaterials with different concentrations on the growth and rhizospheric soil fertility of rice seedling were analyzed. The results showed that the fresh weight, dry weight and plant height of rice seedlings treated with 0.5 mg/g nZnO increased, but 1, 2 mg/g nZnO treatment was just the opposite. The dry weight and plant height of rice seedlings treated with 2 mg/g nSiO2 decreased significantly. The nitrogen content of rice seedlings treated with 0.5 and 2 mg/g nSiO2 was significantly decreased. P content in rice seedlings treated with three concentrations of nZnO increased and K content decreased significantly. The effects of 1, 2 mg/g nTiO2 treatment on plant growth, main nutrient (N, P, K) content and soil available nitrogen, available phosphorus, available potassium were not significant. Soil pH and organic matter contents decreased after treated with nSiO2 and nTiO2 at three concentrations, soil available nitrogen and available phosphorus contents increased significantly after treat with 1and 2 mg/g nSiO2, and soil available phosphorus and available potassium contents decreased after treated with nZnO at three concentrations. The activity of soil acid phosphatase was significantly inhibited and that of catalase was significantly promoted after treated with all three kinds of nanomaterials, and the activities of soil invertase and urease were significantly inhibited under three different concentrations of nZnO. All in all, among three nanomaterials mentioned above, nZnO treatment has the strongest influence on growth, nutrient uptake and rhizospheric soil enzyme activity of rice seedings.
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