植物营养与肥料学报2013，Vol.19Issue(1)：45-53,9.DOI:10.11674/zwyf.2013.0106
施氮量对甜玉米产量、品质和蔗糖代谢酶活性的影响
Effects of nitrogen fertilization on yield, quality and enzyme activity associated with sucrose metabolism of sweet corn
摘要
Abstract
To determine the effects of nitrogen fertilizer on fresh ear yield, quality and enzyme activity associated metabolism of sweet corn, a field experiment was conducted with two corn cultivars, Yangtian 2 and Chaotian 135. There were four nitrogen rates, NO, 75, 225 and 375 kg/ha. The results show that the fresh ear yield of Yangtian 2 and Chaotian 135 are significantly increased under the nitrogen fertilization, and the yield is highest under N 225 kg/ha application. Compared with no-nitrogen treatment, the yields of the treatment with N 225 kg/ha of the two cultivars are increased by 65. 15% and 99. 61% respectively. The contents of soluble sugar and sucrose at the grain filling stage are single peaked curves. In a proper range of nitrogen level, the contents of soluble sugar and sucrose are increased significantly with the increase of nitrogen level, and the contents are highest under N 225 kg/ha application. The rates of nitrogen fertilization have great effects on texture properties of sweet corn, the hardness of grains is significantly increased with the amount of nitrogen fertilizer increased, and the fracturability is significantly increased at first and then decreased with the increase of N fertilizer application. The value of fracturability reaches the highest level under N 225 kg/ha application. The dynamic changes of activities of sucrose phosphate synthase ( SPS) and sucrose synthase ( SS, synthesis) are similar to the sucrose accumulation. With the proceeding of grain filling, the activity of SS (cleavage) is gradually increased. Appropriate N fertilizer could increase the activities of SPS and SS (synthesis) and improve the content of sugar and nutrition quality of sweet corn.关键词
甜玉米/氮肥/产量/品质/蔗糖代谢Key words
sweet corn/ nitrogen fertilizer/ yield/ quality/ sucrose metabolism分类
农业科技引用本文复制引用
赵福成,景立权,闫发宝,陆大雷,王桂跃,陆卫平..施氮量对甜玉米产量、品质和蔗糖代谢酶活性的影响[J].植物营养与肥料学报,2013,19(1):45-53,9.基金项目
国家自然科学基金(30971731,31000684) （30971731,31000684）
江苏省高校自然科学基金(11KJB210006) （11KJB210006）
江苏高校优势学科建设工程项目资助. （）
