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利用开放式空气CO2 浓度增高 (FACE)系统平台 ,研究大田栽培条件下粳稻武香粳 14号稻米品质性状对CO2 浓度增高 2 0 0 μmol·mol-1的响应 .结果表明 ,FACE处理稻谷的出糙率平均比CK高 1 4个百分点 ,整精米率平均比CK低 12 3个百分点 ,较低的供N水平有利于提高FACE条件下的出糙率 ,较高的供N水平有利于提高FACE条件下的整精米率 ;FACE处理的稻米垩白略有增加 ,垩白粒率平均比CK高 11 9个百分点 ,垩白度平均比CK平均高 2 8个百分点 ,较高的供N和供P水平有利于降低FACE条件下垩白大小、垩白粒率和垩白度 ;FACE处理稻米糊化温度平均比CK平均高 0 5 2℃ ,胶稠度有提高的趋势 ,但对稻米直链淀粉含量影响较小 ,较高的供N和供P水平有利于降低FACE条件下稻米的直链淀粉含量 ,较低的供N和较高的供P水平有利于降低FACE条件下稻米胶稠度 ,较低的供N水平有利于降低FACE条件下稻米糊化温度 ;FACE处理使稻米蛋白质含量比CK平均低 0 6个百分点 ,较低的供N和供P水平有利于降低FACE条件下稻米蛋白质含量 .
The response of grain quality of Japonica rice Wuxiangjing 14 to CO2 concentration 200 μmol · mol-1 was studied by open air CO2 enrichment (FACE) system platform.The results showed that the FACE treatment of rice The average roughness rate was 14% higher than that of CK, and the average milled rice rate was 12 3% lower than that of CK. The lower N supply was beneficial to increase the browning rate under FACE, while the higher N supply was more favorable for FACE Milled rice under FACE treatment increased slightly, chalky grain rate was 11 9 percentage points higher than CK, and average chalkiness was 28% higher than CK P level decreased the chalky grain size, chalky grain rate and chalkiness under FACE. The gelatinization temperature of FACE treatment was 0.52 ℃ higher than that of CK, and the gel consistency tended to increase. However, Content had a little effect. Higher N supply and P supply could reduce the amylose content of rice under FACE. Lower N supply and higher P supply could reduce the gel consistency of FACE, Low levels of N are conducive to reducing rice gelatinization under FACE conditions FACE treatment decreased the protein content of rice by 26% compared with that of CK. The lower N and P levels decreased the protein content of rice under FACE.