水稻不同生育期磷素营养对开放式空气二氧化碳浓度增高的响应

应用生态学报 ›› 2005, Vol. 16 ›› Issue (5): 924-928.

水稻不同生育期磷素营养对开放式空气二氧化碳浓度增高的响应

杨连新¹, 杨洪建¹, 黄建晔¹, 王余龙¹, 朱建国², 刘红江¹, 董桂春¹, 单玉华¹

1. 扬州大学农学院, 扬州 225009;
2. 中国科学院南京土壤研究所, 南京 210008

收稿日期:2004-03-17 修回日期:2004-06-29 出版日期:2005-05-15 发布日期:2005-05-15
通讯作者: 王余龙
基金资助:
国家自然科学基金重大国际合作研究项目(40120140817)、国家自然科学基金项目(30270777)、中国科学院知识创新工程项目(KZCX-2-408)和江苏省高校自然科学研究计划资助项目(04KJB210159).

Effects of free-air CO₂ enrichment (FACE) on phosphorus nutrition of Oryza sativa at its different growth stages

1. Agriculture College of Yangzhou University, Yangzhou 225009, China;
2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China

Received:2004-03-17 Revised:2004-06-29 Online:2005-05-15 Published:2005-05-15

摘要/Abstract

摘要： 2001年和2002年利用农田开放式空气CO₂浓度增高(FACE)系统平台,研究不同施N量条件下FACE对武香粳14号不同生育时期磷含量、磷积累、磷分配和磷效率的影响.结果表明,FACE使水稻不同生育时期植株含磷率和吸磷量显著或极显著增加,增幅分别为3.9%～20.6%和28.9%～71.4%;FACE使水稻抽穗后磷在生殖器官中的比例下降9.8%～26.3%,在营养器官中的比例增加2.2%～23.9%,均达显著或极显著水平,而FACE对抽穗前磷在叶片、茎鞘中的比例无显著影响;FACE使水稻不同生育时期单位磷的干物质生产效率、籽粒生产效率和收获指数均明显下降,降幅分别为3.7%～16.6%、6.5%～15.5%和5.4%～9.0%;氮处理以及氮与FACE处理的互作对水稻不同生育时期的磷素营养影响较小.

关键词: 水稻, 自由空气CO浓度增加(FACE), P积累, P分配, P效率

Abstract: Using free-air CO₂ enrichment (FACE) platform and under different nitrogen supply level,this paper studied the phosphorus nutrition of Oryza sativa at its different growth stages.The CO₂ concentration of FACE platform was 200 μmol·mol -1 more than that in ambient air,and the nitrogen supply levels were 150 kg·hm^-2,250 kg·hm^-2 and 280 kg·hm^-2.The results showed that during rice growth period,FACE significantly increased the phosphorus content of rice plant and its phosphorus uptake by 3.9%～20.6% and 28.9%～71.4%,respectively.Before heading,FACE had little effect on the phosphorous accumulation in leaf or stake,but after heading,it made the proportion of phosphorus accumulation in reproductive organ decreased by 9.8%～26.3% and that in vegetative organ increased by 2.2%～23.9% at 0.01 or 0.05 significant level.Under FACE treatment,the phosphorus use efficiency for biomass production (PUEp) at different growth stages,the phosphorus use efficiency for grain output (PUEg),and the phosphorus harvest index (PHI) were decreased by 3.7%～16.6%,6.5%～15.5%,5.4%～9.0%,respectively.Nitrogen supply level and its interaction with FACE had less effect on the phosphorus nutrition of rice at its different growth stages.

Key words: Oryza sativa, Free-air CO₂ enrichment (FACE), Phosphorus uptake, Phosphorus distribution, Phosphorus efficiency

中图分类号:

Q948
S511

杨连新, 杨洪建, 黄建晔, 王余龙, 朱建国, 刘红江, 董桂春, 单玉华. 水稻不同生育期磷素营养对开放式空气二氧化碳浓度增高的响应[J]. 应用生态学报, 2005, 16(5): 924-928.

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