摘要
黄土高原旱地土壤微量元素硒锌钼潜在缺乏,不仅影响农作物产量,还降低农产品的矿物营养品质,研究施用硒锌钼肥料对该地区作物生长及可食部分营养元素含量的影响具有重要意义。通过田间试验,研究了硒锌钼肥单独土施、硒锌肥配施、硒锌钼肥配施对马铃薯和小白菜产量及营养元素和硒镉含量的影响。结果表明:硒肥提高了马铃薯块茎和小白菜叶片硒含量,分别由对照的0.02mg.kg-1和0.09mg.kg-1提高到1.51～2.15mg.kg-1和13.03～19.44mg.kg-1,钼肥提高了马铃薯块茎和小白菜叶片钼含量,分别由对照的0.43mg.kg-1和2.3mg.kg-1提高到1.03～1.16mg.kg-1和17.7～19.9mg.kg-1,单施与配施处理间无显著差异。锌肥土施或锌与硒、钼肥配合土施不但使小白菜叶片中的锌含量由对照的21.0mg.kg-1显著提高到48.1～68.4mg.kg-1,还使镉含量显著降低50%以上;施锌对马铃薯块茎的锌含量无显著影响。硒锌钼肥单施或配施均对马铃薯和小白菜产量及氮、磷、钾、硫、钙、镁、铁、锰、铜、硼含量无显著影响。因此,在黄土高原旱地,硒钼配合土施可同时提高马铃薯块茎的硒钼含量,硒锌钼配合土施可同时提高小白菜叶片的硒锌钼含量。
On the dryland of the Loess Plateau in China,deficiency of Se,Zn and Mo not only impacts crop yields,but also reduces the essential nutrient concentrations in agricultural products.Therefore,in order to improve the crop yield and its nutritional quality,field experiments were carried out to investigate the effects of separately soil-applied selenium（Se）,zinc（Zn）and molybdenum（Mo）fertilizer or their combination on the yield and concentrations of mineral nutrient,Se and cadmium（Cd）of potato and cabbage.Obtained results showed that soil Se application significantly increased Se concentrations in potato tubers and cabbage leaves from 0.02 mg.kg-1 and 0.09 mg.kg-1 to 1.51～2.15 mg.kg-1 and 13.03～19.44 mg.kg-1,respectively,soil applied Mo significantly increased Mo concentrations from 0.43 mg.kg-1 to 1.03～1.16 mg.kg-1 in potato tubers and 2.3 mg.kg-1 to 17.7～19.9 mg.kg-1 in cabbage leaves,and the increment of Se and Mo concentration was not significantly different between separate and combined application of Se and Mo fertilizers.Soil application of Zn alone or together with Se and Mo fertilizers significantly increased Zn concentrations in cabbage leaves from 21.0 mg.kg-1 to 48.1～68.4 mg.kg-1,and also significantly decreased Cd concentrations of cabbage leaves by more than 50%.Soil Zn application had no effect on the Zn concentration of potato tubers.However,neither separate nor combined application of microelements had significant effect on the yields of potato and cabbage,and also con centrations of nitrogen（N）,phosphorus（P）,potassium（K）,sulfur（S）,calcium（Ca）,magnesium（Mg）,iron（Fe）,manganese（Mn）,copper（Cu）and boron（B）in cabbage leaves and potato tubers.In conclusion,in the Loess Plateau areas,soil application of Se and Mo fertilizers could improve Mo and Se nutrition of potato tube,and soil application of Se,Zn and Mo fertilizer could improve Se,Zn and Mo nutrition of cabbage leaves.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2012年第11期2114-2120,共7页
Journal of Agro-Environment Science
基金
农业公益性行业科研专项(201103005
201103003)
国家自然科学基金(30871596
30971866)
关键词
马铃薯
小白菜
产量
营养元素
硒
锌
钼
镉
potato
cabbage
yield
nutritional elements
selenium
zinc
molybdenum
cadmium
