水稻磷素对开放式空气CO_2浓度增高响应的研究  

Effects of Free-air CO_2 Enrichment (FACE) on Phosphorus Accumulation and Utilization at Different Growth Stages in Rice (Oryza sativa L.) Cultivar Wuxiangjing 14

作　　者：黄建晔[1] 杨连新[1] 杨洪建[1] 王余龙[1] 朱建国[2] 刘红江[1] 董桂春[1] 单玉华[1] 

机构地区：[1]扬州大学江苏省作物栽培生理重点实验室,江苏扬州225009 [2]中国科学院南京土壤研究所,江苏南京210008

出　　处：《扬州大学学报（农业与生命科学版）》2004年第4期1-6,共6页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：国家自然科学基金资助项目(30270777;30471013);国家自然科学基金重大国际合作研究资助项目(40120140817);中国科学院知识创新重要方向资助项目(KZCX-2-408);江苏省高校自然科学研究计划(ZK0210181);扬州大学高层次人才科研启动基金

摘　　要：2001～2003年利用农田开放式空气CO2浓度增高(FACE)系统平台,研究FACE对武香粳14号不同生育时期磷素含量、吸收、分配及其效率的影响。结果表明:1FACE处理使水稻不同生育时期植株磷素含量增加,增幅为2.48%～18.84%;2FACE处理使水稻不同生育时期磷素积累量显著或极显著增加,增幅为28.74%～59.11%,生育前期的增幅明显大于生育中、后期;3FACE处理对水稻抽穗前磷素在叶片、茎鞘中的分配比例无显著影响,但使抽穗后磷素在稻穗中的分配比例明显减少,在叶片和茎鞘中的分配比例明显增加;4FACE处理使水稻不同生育时期磷素物质生产效率增加,增幅为2.53%～16.58%;5FACE处理使水稻磷素籽粒生产效率和收获指数下降,降幅分别为6.53%～15.51%和1.48%～9.04%。Global atmospheric carbon dioxide (CO_2) concentrations will probably reach the levels of 650-(780 μL·L^(-1)at) the end of this century (IPCC, 2000). Because CO_2is needed for plant photosynthesis, this increment has the potential to enhance the growth and development of many agricultural crop species. However, little knowledge is known about free-air CO_2enrichment (FACE) and its interactive effects with phosphorus supply on phosphorus content, phosphorus uptake, phosphorus distribution and phosphorus efficiency of rice plant at different growth stages. A FACE experiment at Anzhen, Wuxi, Jiangsu province, in 2001-2003 was conducted, using the japonica cultivar Wuxiangjing 14. The target concentration of CO_2in the FACE plots exceeded that in the ambient air by 200 μL·L^(-1). Results showed that: ① phosphorus content in rice plant sampled at different growth stages increased by range of (2.48%-)18.84% under FACE treatment compared with CK. ② phosphorus accumulation in rice plant significanly increased with range of 28.74%-59.11% under FACE treatment, and the increasing rate at early growth stage (EGS) was larger than that at middle (MGS) and late growth stage (LGS). ③ phosphorus distributed to leaves, stem at EGS and MGS was not affected, while that to spike was lower, to leaves and stem at LGS was higher under FACE treatment. ④ FACE treatment resulted in the range of 2.53%-16.58 increase in phosphorus use efficiency for biomass production. ⑤ FACE reduced P use efficiency for grain output and P harvest index, with range of 6.53%-15.51% and 1.48%-9.04%, respetively.

关 键 词：水稻 开放式空气CO2浓度增加 磷素 吸收 分配 

分 类 号：S511.062[农业科学—作物学]