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通过田间试验,按尿素种类和施肥量共设7个处理,研究控释尿素对大豆农艺性状、含氮量及产量的影响。结果表明:与普通尿素相比,多肽尿素、长效缓释尿素、大颗粒尿素、硫包衣尿素提高了大豆干物质、氮素积累量、氮肥利用率及产量。多肽尿素、长效缓释尿素低氮处理对大豆干物质、氮素积累量、氮肥利用率的影响最为明显,鼓粒期干物质量分别比普通尿素提高了11.1,18.1 g,氮素积累总量比普通尿素增加了0.83±1.11 g·m-2,氮肥利用率比普通尿素增加了10.73%和15.16%;多肽尿素高氮量处理、长效缓释尿素低氮处理对大豆的增产效果最为显著,分别比普通尿素增加9.5%和11.0%。
Through field experiments, a total of seven treatments were conducted according to the type of urea and the amount of fertilizer applied to study the effects of controlled release urea on the agronomic characters, nitrogen content and yield of soybean. The results showed that compared with common urea, the contents of dry matter, nitrogen accumulation, nitrogen use efficiency and yield of soybean were increased with polypeptide urea, long-acting slow release urea, large particle urea and sulfur-coated urea. The effects of polypeptide urea and long-term slow-release urea and low-N treatment on the dry matter, nitrogen accumulation and nitrogen use efficiency of soybean were the most obvious. The dry matter mass at druming stage was increased by 11.1 and 18.1 g, Compared with normal urea, the urea utilization rate increased by 0.83 ± 1.11 g · m-2, and the utilization rate of nitrogen fertilizer increased by 10.73% and 15.16% compared with that of normal urea. The effect of high concentration of polypeptide urea and prolonged release of urea and low nitrogen treatment on soybean yield was the most significant , Respectively, than ordinary urea increased by 9.5% and 11.0%.