不同氮肥模式对夏玉米产量、蛋白质品质和氮素利用特性的影响
以高产玉米品种郑单958和先玉335为供试材料,在大田生产条件下,设置4个施氮水平：0 kg/hm2(N0)、180 kg/hm2(N1)、240 kg/hm2(N2)和300 kg/hm2(N3),研究并探讨不同氮肥模式对两个高产玉米品种籽粒产量、蛋白质产量及氮素利用特性的影响。结果表明：(1)两玉米品种籽粒产量随施氮量的增加显著增加,均以N2处理最高。品种间比较,先玉335籽粒产量显著高于郑单958。(2)两玉米品种籽粒蛋白质含量及其产量随施氮量的增加显著增加。品种间比较,先玉335的蛋白质含量及其产量均高于郑单958。(3)两玉米品种氮素利用效率、氮肥生产效率和氮肥农学利用效率随施氮量的增加而显著降低,均以N1处理最高。品种间比较,先玉335的氮素利用效率、氮肥生产效率和氮肥农学利用效率均高于郑单958。综合分析认为,两玉米品种均以N2处理可以同步协调实现籽粒产量、蛋白质含量和氮素利用效率,获得产量、品质和高氮素利用效率的协调统一。
英文摘要:
In order to provide scientific basis for high yield and efficient maize cultivation, a field experiment was carried out at Yanjin institution of agricultural sciences in 2013 growth seasons, using two high-yield maize cultivars, Zhengdan 958 and Xianyu 335. Four nitrogen application rates were arranged with 0 kg/hm2 (N0), 180 kg/hm2(N1), 240 kg/hm2(N2) and 300 kg/hm2(N3). The objective of this study was to investigate grain yield, protein yield and N utilization characteristics of two types of maize cultivars under different nitrogen regimes. The results showed that With the increase of N application rate, grain yield in two maize varieties increased, grain yield in N2 treatment was the highest for both cultivars. Under different N regimes, grain yield of Xianyu 335 was higher than that of
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