控释尿素对水稻生长的影响

目的]研究了金正大控释肥料对水稻产量及其性状的影响。方法]以水稻品种辽星1号为试验材料,研究施用金正大控释尿素不同用量和不同掺混比例对水稻产量及其性状的影响。结果]在等氮量条件下,控释尿素比普通尿素提高氮肥表观利用率16.5~22.4个百分点,水稻增产6.8%~8.9%。减量30%的控释尿素与2次性施用全量的普通尿素,其水稻产量接近。控释尿素与普通尿素掺混使用效果好,可以提高氮肥利用率。施用70%的控释尿素掺混30%的普通尿素,与单纯施用等氮量的普通尿素相比,水稻增产17.5%,氮肥表观利用率提高28.6个百分点;与单纯施用等氮量的控释尿素相比,水稻增产7.3%,氮肥表观利用率提高15.8个百分点。结论]施用金正大控释尿素可提高氮肥表观利用率,并通过增加穗粒数和百粒重提高水稻产量。

Effects of Controlled-release Urea on the Growth of Rice

Objective] The aim was to study the effect of Jinzhengda controlled-release fertilizer on yield and its character of rice.Method] With the rice variety Liaoxing 1 of as the test material,the effect of application of Jinzhengda controlled-release urea with different dosage and mixing proportion on yield and its character of rice were studied.Result] Under the conditions of equal N, the controlled-release urea heightened N fertilizer apparent utilization by 16.5-22.4 percent points than the common urea and increased the rice yield by 6.8%-8.9%.The rice yields were approached for the controlled-release urea with 30% decrement and the common urea with twice applying of total amount.The mixing application of controlled-release urea and common ones had good effect,and use efficiency of N fertilizer could be improved.The application of 70% controlled-release urea mixed with 30% common urea,could increase the rice yield by 17.5% and N fertilizer apparent utilization by 28.6 percent points when compared with application of common urea with equal N,and increase the rice yield by 7.3% and N fertilizer apparent utilization by 15.8 percent points when compared with application of only controlled-release urea with equal N.Conclusion] The applying of Jinzhengda controlled-release urea could improve N fertilizer apparent utilization,and the rice yield could be heightened by increasing grains per spike and 100-seed weight.