不同种植方式下磷素营养对陆稻和水稻米质的影响

 以粳型陆稻中旱3号和粳型水稻扬辐粳8号为材料，设置裸地旱作和水作2种种植方式及3个磷素(P2O5  )水平：低磷（LP，45  kg/hm2）、常磷(NP，90  kg/hm2)和高磷(HP，135 kg/hm2)，比较了陆稻和水稻米质的差异。旱作条件下，随着施P量的增加，陆稻和水稻产量均随之增加;  水作条件下，HP下陆稻的产量较NP增加，水稻的产量HP较NP减少，但差异均不显著。旱作条件下，中旱3号LP水平下整精米率、外观品质和蒸煮食味品质表现较好，扬辐粳8号（NP水平下外观品质表现较好）与中旱3号基本一致；水作条件下，中旱3号LP水平下整精米率较高，NP水平下蒸煮食味品质较好，扬辐粳8号与中旱3号基本一致，但外观品质表现不一。旱作使陆稻和水稻的整精米率提高，外观品质改善，水稻蒸煮品质和营养品质提高。与水稻相比，陆稻的加工品质、营养品质和食味品质较优。表明陆稻和水稻的米质对种植方式和磷素的互作响应有差异。

Effects of Phosphorous on Grain Quality of Upland and Paddy Rice under Different Cultivations

To investigate the responses of rice quality of upland rice and paddy rice to phosphorous(P) fertilizer and the interaction between cultivation methods and P levels,a japonica upland rice Zhonghan 3 and a japonica paddy rice Yangfujing 8 were grown under both moist cultivation(MC,contro1) and bare dry-cultivation(DC) with three P levels,low amount of P(LP,45 kg/hm2),normal amount of P(NP,90 kg/hm2),and high amount of P(HP,135 kg/hm2).With the increase of P levels,grain yields of both upland and paddy rice w...