FACE下二氧化碳、施氮量、密度和锌肥对Ⅱ优084稻米锌浓度及有效性的影响

doi:10.3969/j.issn.1001-7216.2014.03.008

中国水稻科学 ›› 2014, Vol. 28 ›› Issue (3): 289-296.DOI: 10.3969/j.issn.1001-7216.2014.03.008

FACE下二氧化碳、施氮量、密度和锌肥对Ⅱ优084稻米锌浓度及有效性的影响

周三妮¹,王云霞^2,* ,赖上坤¹,齐义涛¹ ,朱建国³ ,杨连新¹ ,王余龙^1,*

¹扬州大学江苏省作物遗传生理重点实验室，江苏扬州 225009； ²扬州大学环境科学与工程学院，江苏扬州 225009； ³中国科学院南京土壤研究所，南京210008；

收稿日期:2013-07-16 修回日期:2013-09-18 出版日期:2014-05-10 发布日期:2014-05-10
通讯作者: 王云霞2,* ,王余龙1,*
基金资助:
国家自然科学基金资助项目（31171460， 31371563）；国家自然科学基金重大国际合作项目（31261140364）；江苏省高校自然科学重大基础研究项目（11KJA210003）；江苏省普通高校研究生科研创新计划资助项目（CXLX13_915）；江苏高校优势学科建设工程资助项目。

Effects of Elevated CO2 Concentration, Nitrogen Fertilization, Planting Density and Foliar Zn Application on Rice Zn concentration and Bioavailability of Supper Rice Ⅱyou 084 under FACE Conditions

ZHOU Sanni¹, WANG Yunxia^2,* , LAI Shangkun¹, QI Yitao¹, ZHU Jianguo³, YANG Lianxin¹, WANG Yulong^1,*

¹Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China; ²College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, China; ³Institute of Soil Science， Chinese Academy of Sciences， Nanjing 210008, China;

Received:2013-07-16 Revised:2013-09-18 Online:2014-05-10 Published:2014-05-10
Contact: WANG Yunxia2,*,WANG Yulong1,*

摘要/Abstract

摘要： 利用稻田FACE（Free Air CO2 Enrichment）平台，以Ⅱ优084为供试材料，主区CO2处理设置环境CO2浓度（Ambient）和高CO2浓度（比Ambient高50%）两个水平，裂区设置施氮量（15和25 g/m2）、移栽密度（16和24 株/m2，单本栽插）以及叶面施锌（0%和0.2%ZnSO4）处理，研究大气CO2浓度升高对超级稻精米和糙米锌浓度和有效性的影响。精米锌浓度、植酸含量以及植酸与锌的摩尔比均明显低于糙米。大气CO2浓度升高使精米和糙米锌浓度平均下降5%和7%，锌处理使对应部位锌浓度分别增加40%和63%，差异均达极显著水平，但施氮量或栽插密度处理对两部位锌浓度影响未达显著水平。CO2浓度和锌处理对精米和糙米的植酸含量均无显著影响，但增加施氮量和移栽密度使糙米植酸含量分别下降8%和6%，差异均达极显著水平。大气CO2浓度升高使精米和糙米中植酸与锌的摩尔比平均增加6%和7%，锌处理使对应部位植酸与锌的摩尔比分别下降28%和40%，增加施氮量和移栽密度使糙米中植酸与锌的摩尔比平均下降10%和7%。说明高浓度CO2环境下超级稻Ⅱ优084食用部位微量元素锌含量下降且生物有效性降低，但适当增加施氮量或移栽密度特别是结实期叶面喷施锌肥，可不同程度地改善该品种稻米的锌营养水平。

关键词: 水稻, 二氧化碳, FACE（Free Air CO2 Enrichment）, 锌浓度, 锌有效性

Abstract: Elevated atmospheric CO2 concentration (\[CO2\]) increases rice yield, but little is known about effects of \[CO2\] on Zn bioavailability of edible parts of rice, as well as the agricultural practices which can improve micronutrient status of rice under high CO2 environment. By using a Free Air CO2 Enrichment (FACE) facility installed in paddy field, super rice Ⅱyou 084 were grown under two levels of CO2 concentration (ambient and 50% higher than ambient), N application (15 and 25 g/m2), planting density (16 and 24 hills/m2) and foliar Zn application (0% and 02% ZnSO4). At maturity, in milled and brown rice Zn and phytate concentrations were analyzed, molar ratio of phytate to Zn were calculated. The results showed that compared to brown rice, milled rice had much lower Zn concentration, phytate concentration and molar ratio of phytate to Zn. Elevated \[CO2\] significantly decreased Zn concentration of milled and brown rice by 5% and 7%, respectively; Foliar Zn application significantly increased Zn concentration of milled and brown rice by 40% and 63%, respectively. However, the changes of N application and planting density had no effects on rice Zn concentration. Phytate concentrations of milled and brown rice were not affected by either CO2 or Zn treatments, but higher levels of N application and planting density significantly decreased phytate concentration of brown rice by 8% and 6%, respectively. The molar ratios of phytate to Zn in milled and brown rice were significantly increased at elevated \[CO2\] in average of 6% and 7%, but decreased under foliar Zn application by 28% and 40%, respectively. The high levels of N application and planting density had little effects on molar ratio of phytate to Zn in milled rice, but in brown rice,it decreased by 10% and 7%. Our results indicate that the content and bioavailability of micronutrient Zn in edible part of rice Ⅱyou 084 will be lower under future high CO2 environment, but modification of agronomic practice such as ample N application, increase of planting density, especially foliar Zn application during grain filling stage can improve Zn nutrition of rice seeds to various degree.

Key words: rice, CO2, FACE (Free Air CO2 Enrichment), Zn concentration, Zn bioavailability

中图分类号:

周三妮1,王云霞2,* ,赖上坤1 ,齐义涛1 ,朱建国3 ,杨连新1 ,王余龙1,*. FACE下二氧化碳、施氮量、密度和锌肥对Ⅱ优084稻米锌浓度及有效性的影响[J]. 中国水稻科学, 2014, 28(3): 289-296.

ZHOU Sanni1, WANG Yunxia1, LAI Shangkun1, QI Yitao1, ZHU Jianguo2, YANG Lianxin1,*, WANG Yulong1,*. Effects of Elevated CO2 Concentration, Nitrogen Fertilization, Planting Density and Foliar Zn Application on Rice Zn concentration and Bioavailability of Supper Rice Ⅱyou 084 under FACE Conditions[J]. Chinese Journal of Rice Science, 2014, 28(3): 289-296.

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FACE下二氧化碳、施氮量、密度和锌肥对Ⅱ优084稻米锌浓度及有效性的影响

Effects of Elevated CO2 Concentration, Nitrogen Fertilization, Planting Density and Foliar Zn Application on Rice Zn concentration and Bioavailability of Supper Rice Ⅱyou 084 under FACE Conditions

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