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按尿素种类和施肥量共设6个处理,研究控释尿素和普通尿素混施对大豆农艺性状及产量和品质的影响。结果表明:控释尿素和普通尿素混施能够提高大豆不同生育期的株高和干物质积累量,且T6(控释尿素100%)提高最多。从R2到R6时期,叶绿素含量逐渐增加,R4和R2期施肥各处理与对照相比差异达到显著水平,处理T4(控释尿素50%+常规尿素50%)叶绿素值最高,但各施肥处理间差异不显著;叶面积指数(LAI)值先增大后减小,R4时期最大,施肥处理LAI显著高于不施肥对照,且以处理T4最佳。控释尿素和普通尿素混施极显著提高了大豆的产量,且以T4处理产量最高。控释尿素不同比例混施能够提高蛋白质含量,降低脂肪含量,并使蛋脂总量增加。综合试验结果可知,控释尿素50%+常规尿素50%为最佳混施比例。
According to the types of urea and fertilizer, six treatments were set up to study the effects of controlled release urea and ordinary urea on the agronomic characters, yield and quality of soybean. The results showed that the combination of controlled release urea and ordinary urea increased the plant height and dry matter accumulation at different growth stages of soybean, and T6 (controlled release urea 100%) increased most. From R2 to R6, the content of chlorophyll increased gradually, and the difference between the treatments of R4 and R2 fertilization reached the significant level compared with the control. The chlorophyll value of T4 (50% of controlled-release urea + 50% of conventional urea) was the highest, LAI increased firstly and then decreased, and reached the maximum in R4, and the LAI of fertilization was significantly higher than that of non-fertilization and T4 was the best. Controlled release urea and ordinary urea mixed significantly increased the yield of soybean, and the highest yield of T4 treatment. Controlled-release urea mixed with different proportions can increase the protein content, reduce fat content, and increase the total amount of fat. The comprehensive test results show that the controlled release of urea 50% 50% of conventional urea is the best mixture ratio.