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以郑单958为材料,分析不施氮(N0)、施纯氮103.5 kg/hm2(N1)、207 kg/hm2(N2)、310.5 kg/hm2(N3)对玉米子粒淀粉粒形态及分布特征的影响。结果表明,不同处理玉米子粒淀粉粒直径分布均为三峰曲线。>2μm淀粉粒的直径百分比最大(96%～97%),淀粉粒直径均值为N2>N3>N0>N1处理。各处理淀粉粒直径下限均值为0.375μm;淀粉粒直径上限均值为N2>N0>N3>N1处理。由透射电镜扫描图得知,第一层细胞质体大小及淀粉粒数量说明其细胞发育进程N0N1>N2>N3;第三层细胞均为长条形,各处理含皱褶淀粉粒均已出现,淀粉粒发育进程N1>N0>N2>N3;深层细胞淀粉粒均有褶皱,说明其发育早于第三层细胞。淀粉粒发育由内而外,氮肥可以调节胚乳淀粉粒分布及淀粉粒发育速度。
Using Zhengdan 958 as material, the effects of N0, 103.5 kg / hm2 (N1), 207 kg / hm2 (N2), 310.5 kg / hm2 (N3) on the grain morphology and distribution of maize kernels were analyzed. Impact. The results showed that the diameter distribution of starch granules in different treatments were three-peak curve. > 2μm starch granules had the largest percentage of diameter (96% -97%), and the mean diameter of starch granules was N2> N3> N0> N1. The average value of the lower limit of the diameter of starch granules was 0.375μm and the average value of the diameter of the starch granules was N2> N0> N3> N1. The results of transmission electron microscopy showed that the first layer of cytoplasm and the number of starch granules showed that the process of cell development was N0 N1> N2> N3. The third layer of cells were all elongated, and the folds of starch granules of all treatments had appeared. The process of starch granules development was N1> N0> N2> N3. Starch grains are pleated, indicating that its development earlier than the third layer of cells. Starch grain development from the inside out, nitrogen fertilizer can regulate the distribution of endosperm starch grains and starch grain growth rate.