浙江农业学报 ›› 2017, Vol. 29 ›› Issue (12): 1963-1969.DOI: 10.3969/j.issn.1004-1524.2017.12.02

• 作物科学 • 上一篇    下一篇

不同沼液施用量对水稻生长、产量及重金属含量的影响

邵文奇1, 纪力1, 孙春梅1, 姜晓剑2, 文廷刚1, 唐金陵1, 章安康1, *   

  1. 1.江苏徐淮地区淮阴农业科学研究所,江苏 淮安 223001;
    2.淮阴师范学院 生命科学学院,江苏 淮安 223300
  • 收稿日期:2017-05-27 出版日期:2017-12-20 发布日期:2018-01-08
  • 通讯作者: 章安康,E-mail:2530326440@qq.com
  • 作者简介:邵文奇(1985—),男,江苏淮安人,硕士,副研究员,主要从事土壤肥料、作物栽培等方面的研究。E-mail:wqshao1103@sina.com
  • 基金资助:
    江苏省农业科技自主创新资金[CX(16)1003-10]

Effects of application rate of biogas slurry on growth, grain yield and heavy metals contents of rice

SHAO Wenqi1, JI Li1, SUN Chunmei1, JIANG Xiaojian2, WEN Tinggang1, TANG Jinling1, ZHANG Ankang1, *   

  1. 1. Huaiyin Institute of Agricultural Sciences of Xuhuai Region in Jiangsu, Huai'an 223001, China;
    2. School of Life Sciences, Huaiyin Normal University, Huai'an 223300, China
  • Received:2017-05-27 Online:2017-12-20 Published:2018-01-08

摘要: 为探讨沼液在水稻上的适宜用量用法,以规模化养殖场猪粪尿发酵的沼液作为肥源,以当地常规化学施肥为对照,研究不同沼液用量对水稻生长、产量、重金属含量等的影响。结果表明:当沼液总施用量低于750 t·hm-2时,水稻株高有增加趋势,同时分蘖能力提高;当沼液总施用量大于750 t·hm-2时,株高不再增加且分蘖能力显著(P<0.05)下降。施用沼液对叶片荧光强度影响较小,但不合适的沼液适用量下会对净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)等光合特性产生抑制作用。与传统化肥处理相比较,施用沼液显著(P<0.05)降低了水稻结实率、穗实粒数、千粒重等,但能提高总穗数,沼液施用量600 t·hm-2时,水稻产量及其构成表现最好。沼液施用使水稻秸秆中汞、铬、铜、砷等重金属含量均有不同程度增加,存在一定的重金属风险,但籽粒中重金属含量未见增加,且符合中国食品中重金属限量标准(GB 2762—2012),不存在重金属超标风险。综合来看,沼液总施用量600 t·hm-2(基肥:追肥=1:1)较为适宜。

关键词: 沼液, 肥效, 水稻, 重金属, 食品安全

Abstract: To investigate the appropriate application rate and method of biogas slurry on rice, the pig manure from large-scale farms was fermented as fertilizer in the experiment to study the effects of different application rate of biogas slurry on rice growth, yield and heavy metals concentrations. It was shown that when the total amount of biogas slurry was below 750 t·hm-2, the height and tillering ability of rice were improved, while the height no longer increased and tillering ability significantly (P<0.05) decreased when the application amount was above 750 t·hm-2. The application of biogas slurry had little effect on the fluorescence intensity of rice leaf, but inhibited the photosynthetic intensity, such as net photosynthesis rate, stomatal conductance, transpiration rate. Compared with conventional fertilizer treatment, the biogas slurry treatments significantly (P<0.05) decreased rice seed setting rate, filled grain number per panicle and 1 000-grain weight, yet increased the total spike number. The application rate of 600 t·hm-2 was appropriate to improve rice yield and its components. However, the biogas slurry treatments had potential risks for heavy metals accumulation in rice straw, as the contents of heavy metals such as Hg, Cr, Cu, As were increased in rice straw compared with conventional fertilizer. But, this risk was not found in grains. Furthermore, the contents of heavy metals in grain had no significant changes and were all met with the national standard of GB 2762-2012. In general, the application of 600 t·hm-2 biogas slurry (basic fertilizer:topdressing=1:1) was appropriate for rice production.

Key words: biogas slurry, fertilizer effect, rice, heavy metal, food security

中图分类号: