【摘要】 为了探明分蘖期水氮管理对香稻香气、产量及品质的影响。在大田条件下,以常规籼型香稻品种农香18和Basmati 385以及粳型香稻品种云粳优14(Y-14)为试验材料,设置3个水分处理(保持水层4~6 cm(W1);间隙湿润灌溉,低限土壤水势为-10 kPa(W2)和轻度落干,低限土壤水势为-20 kPa(W3))和3个氮肥水平处理(分蘖肥纯氮0 kg/hm2(N1)、30 kg/hm2(N2)和60 kg/hm2(N3))。研究了水氮互作处理对香稻糙米2-乙酰-1-吡咯啉(2-AP)含量,产量及其构成因素和稻米品质的影响。结果表明,水氮互作显著影响香稻糙米2-AP含量,适当的水分胁迫(W3)和施用适量分蘖肥(N3)会显著提高糙米2-AP含量,农香18、Basmati 385和Y-14在W3N3处理下糙米香气含量均达到最高,分别达到17.69,30.60,23.15 ng/g,W2N3次之。除Y-14外,供试香稻实际产量均在W2N3条件下最高。分蘖期进行适当的湿润灌溉和施用适量的分蘖肥(60 kg/hm2),能够协同提高香稻产量和稻米香气。更多还原

【Abstract】 The purpose of this study was to investigate the water-nitrogen interaction at tillering stage on aroma, grain yield and rice qualities. A field experiment was conducted with three conventional aromatic rice cultivars,Nongxiang 18( indica),Basmati 385( indica) and Y-14( japonica),three water treatments( W1,well-watered,4- 6 cm; W2,intermittent irrigation,the minimum water potential was- 10 kPa; W3,moderate soil drying,the minimum water potential was- 20 kPa) and three nitrogen treatments:( N1,0 kg / ha; N2,30 kg / ha; N3,60 kg / ha,at tillering stage) were used in this study,to evaluate the effects of the water-nitrogen interaction at tillering stage on 2-AP content in brown rice,grain yield and rice qualities. The results showed that water-nitrogen interaction had an significant influence on 2-AP content in brown rice. The treatment W3 and N3 significantly improved the 2-AP content, Under W3N3 treatment,Nongxiang 18,Basmati 385 and Y-14 achieved the highest 2-AP content,up to 17. 69, 30. 60,23. 15 ng / g,respectively,followed by W2N3. W2N3 treatment harvested highest grain yield than other treatments,except for Y-14. At tillering stage,wet irrigation and using the right amount of tillering nitrogen( 60 kg / ha) can improve grain yield and 2-AP content in brown rice together.更多还原