施氮量对水稻主要米质性状及RVA谱特征参数的影响

在盆栽试验条件下，以汕优63、武育粳3号为试验材料，研究水稻移栽后的施氮量对主要米质性状和RVA谱特征参数的影响。结果表明：整精米率、粗蛋白含量均随施氮量的增加而提高；垩白粒率、垩白度对供氮水平的反应因品种而异；胶稠度随施氮量的提高两者都变软；直链淀粉含量、糊化温度对氮素反应不敏感，处理间无显著差异。稻米

Effect of N-fertilizer on Main Quality Characters of Rice and RVA Profile Parameters

The experiment in pot was carried out with Shanyou 63( indica type hybrid rice) and Wuyujing 3( japanica ). Effects of N-fertilizer application after transplantation on the main quality characters and RVA profile parameters of rice were studied. The results were as follow: effects of N-fertilizer on head milled rice and protein content were improved with the application increase; effect of N-fertilizer on chalkniss varied in different cultivars; gel consistency became softer with the amount increasing of N-fertilizer; alkali spreading value and amylose content were insensitive to the fertilizer. Effects of N-fertilizer on RVA profile parameters varied significantly in two cultivars. There was a conic relationship between peak viscosity and amount of N-fertilizer. Comparing with Wuyujing 3, Shanyou 63 needed less N-fertilizer to reach the tiptop of the peak viscosity. Furthermore, effect of N-fertilizer on breakdown in Shanyou 63 was more obvious than that in Wuyujing 3.