新疆农业科学2018，Vol.55Issue(1)：33-43,11.DOI:10.6048/j.issn.1001-4330.2018.01.005
磷和不同价态硒对小麦硒吸收转运的影响
Effects of Phosphorus and Different Valence Selenium on the Absorption and Transport of Selenium in Wheat
摘要
Abstract
[Objective] The project aims to study the absorption and translocation of exogenous selenium under different phosphorus levels in wheat, and to elucidate the effects of wheat on selenium absorption and translocation and to analyze the translocation and distribution of different selenium in wheat.[Method]Pot ex-periments were conducted to study the uptake and translocation of selenium by selenate and selenite in wheat with phosphorus application.[Result] In the treatment of low amount of selenate,the utilization rate of sele-nium fertilizer in wheat treated with low phosphorus and high phosphorus was increased by 96%and 128%re-spectively compared with that of the treatment without phosphorus; In the treatment of high content of sele-nate,the utilization rate of selenium fertilizer in wheat with low phosphorus and high phosphorus treatment was increased by 78%and 123%,respectively compared with that of the treatment without phosphorus.In low a-mount of selenite and high Liangya selenate treatment,the wheat utilization rate of Se fertilizer of high phos-phorus treatment was decreased by 50.7% and 55.6% compared with that of treatment without phosphorus. When applying selenate,the selenium contents in the roots, stems, leaves and panicles of high phosphorus treatment were increased by 23%,17%,64.6%and 62.1%compared with those of treatments without phos-phorus;When applying selenite,the selenium contents in the roots,stems,leaves and panicles of high phos-phorus treatment were decreased by 71.3%,72.1%80.6% and 73.8% compared with those of treatment without phosphorus.When applying selenate, wheat plant selenium enrichment coefficient of high selenium treatment increased by 28.9%,60.6%and 50.5%respectively compared with those of treatments without se-lenium,with low selenium and with high selenium.When applying selenite,under the condition of low seleni-um and high selenium,wheat plant selenium enrichment coefficient of high phosphorus treatment decreased by 65.3%and 72.3%compared with that of the treatment without P fertilizer.[Conclusion]Phosphorus can ac-tivate the stable selenium in soil,thus improving the bioavailability of selenate.The application of phosphorus reduces the pH value of the soil and promotes the transformation of soluble selenium and exchangeable seleni -um in soil into iron oxide state selenium and organic selenium.But the iron oxide selenium and organic seleni-um are difficult to be absorbed by crops,which reduce the absorption of selenite when phosphorus fertilizer is used together with selenite.关键词
小麦/磷/外源硒/吸收和转运Key words
wheat/phosphorus/exogenous selenium/absorption and translocation分类
农业科技引用本文复制引用
王鹏,侯振安,冶军,张栋,安军妹..磷和不同价态硒对小麦硒吸收转运的影响[J].新疆农业科学,2018,55(1):33-43,11.基金项目
国家科技支撑项目"滴灌条件下粮食作物水肥资源高效利用与农田肥力提升研究与示范"(2012BAD42B02)National Science and Technology Support Program＂Study on and Demonstration of the Efficient Utilization of Water and Fertilizer Resources of Grain Crops and the Improvement of Farmland Fertility under Drip Irrigation＂(2012BAD42B02) （2012BAD42B02）
