College of Agronomy, Hebei Agricultural University , Baoding, Hebei, China.
Hebei Normal University of Science & Technology , Changli, P.R. China.
Bioengineered. 2021 Dec;12(1):527-539. doi: 10.1080/21655979.2020.1865608.
The effects of polyaspartic acid and different controlled-release fertilizers with urea on dry matter accumulation and distribution, nitrogen absorption and accumulation, and the activities of enzymes involved nitrogen metabolism and yield of corn were studied by using xianyu (XY688), a maize nitrogen efficient cultivar, and Jifeng NO.2 (JF2), a maize nitrogen-inefficient cultivar, as experimental materials and through random blocks experimental design in 2019. For XY688, polyaspartic acid chelated nitrogen fertilizer (PASPN) had the highest yield, which was 21.34% higher than N0 treatment. For JF2, it also had the highest yield under PASPN combined urea treatment, which was 23.44% higher than N0 (no nitrogen fertilizer), and JF2 had a 9.7% lower yield under XY688 treatment. For XY688, PASPN treatment had the largest nitrogen uptake in grain, up to 3.14 kg/hm, and PASPN treatment increased 17.4% compared with N0. For JF2, grain nitrogen uptake was also the highest under PASPN treatment, which was significantly different from other treatments. Nitrogen uptake was 3.16 kg/hm, which increased 37.4% compared with N0. Compared with JF2, XY688 showed higher nitrogen uptake efficiency, nitrogen utilization efficiency, and partial nitrogen productivity. For XY688, the highest nitrogen absorption efficiency was SU3 (slow-release urea and ordinary urea) treatment (0.36 kg/kg). The partial nitrogen productivity and harvest index of PASPN treatment were the highest and significantly different from other treatments. The partial nitrogen productivity of PASPN treatment was 57.02 kg/kg. These results can provide help for the further researches of the rational utilization and absorption of nitrogen fertilizer.
采用玉米品种先玉 688（XY688）和吉丰 2 号（JF2）为试验材料，通过随机区组试验设计，研究聚天冬氨酸（PASPN）与不同控释氮肥配施对玉米干物质积累与分配、氮素吸收与积累及氮代谢相关酶活性和产量的影响。对于 XY688，聚天冬氨酸螯合氮肥（PASPN）处理的产量最高，比 N0 处理高 21.34%。对于 JF2，PASPN 与尿素配施处理的产量也最高，比 N0 高 23.44%，而在 XY688 处理下，JF2 的产量低 9.7%。对于 XY688，PASPN 处理的籽粒氮吸收量最大，达到 3.14kg/hm，比 N0 增加 17.4%。对于 JF2，籽粒氮吸收量也在 PASPN 处理下最高，与其他处理差异显著。氮吸收量为 3.16kg/hm，比 N0 增加 37.4%。与 JF2 相比，XY688 表现出较高的氮吸收效率、氮利用效率和偏生产力。对于 XY688，SU3（控释尿素和普通尿素）处理的氮吸收效率最高（0.36kg/kg）。PASPN 处理的偏生产力和收获指数最高，与其他处理差异显著。PASPN 处理的偏生产力为 57.02kg/kg。这些结果可为进一步研究氮肥的合理利用和吸收提供帮助。
