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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.
In 2001 and 2002, the effect of FACE on phosphorus content, phosphorus accumulation, phosphorus allocation and phosphorus efficiency in different growth stages of Wuxiangjing 14 under different N rates was studied by using open field CO 2 enrichment system (FACE) system. The results showed that FACE increased phosphorus content and P uptake at different growth stages significantly, or significantly, from 3.9% to 20.6% and 28.9% to 71.4%, respectively. FACE resulted in a significant increase in P uptake in reproductive organs Decreased by 9.8% -26.3% in vegetative organs and increased by 2.2% -23.9% in vegetative organs, all of which reached significant or extremely significant level. However, FACE had no significant effect on the proportion of phosphorus in leaf and stem sheath before heading; The dry matter production efficiency per unit of phosphorus, grain production efficiency and harvest index were all significantly decreased by 3.7% -16.6%, 6.5% -15.5% and 5.4% -9.0% respectively during the growth period. Nitrogen treatment and nitrogen and FACE treatment Had little effect on phosphorus nutrition in different growth stages of rice.