控失氮肥与普通尿素不同配比对玉米苗期生长的影响

Effects of Different Ratios of Loss-Controlled Nitrogen Fertilizers and Common Urea on Growth of Maize Seedlings

为了解控失氮肥与普通尿素按不同比例掺混后对玉米苗期长势的影响,将含氮质量分数为38%的控失氮肥与普通尿素以养分质量比3∶7、4∶6、5∶5、6∶4和7∶3进行掺混,然后与磷酸一铵和氯化钾配制成NP_2O_5-K_2O=26-10-12的掺混肥,以等养分的控失复合肥为对照,采用盆栽方式开展了玉米苗期试验。试验结果表明:控失氮肥与普通尿素按4∶6掺混时,能够有效提高玉米苗期的株高、SPAD值、地上部和地下部生物量,分别比对照处理高出18.79%、1.18%、22.39%和3.32%,明显改善了玉米苗期长势。

In order to understand the effect of mixed loss-controlled nitrogen fertilizer and common urea blended in different proportions on the growth of maize seedlings, the loss-controlled nitrogen fertilizer with nitrogen content of 38% is blended with common urea, and the nutrient mass ratios are 3：7, 4： 6, 5： 5, 6： 4 and 7： 3, and then it is blended with monoammonium phosphate and potassium chloride to form N- P2 O5- K2O =26- 10- 12 blending fertilizer. The maize seedlings test is can＇ied out in a potted manner with the same nutrient of loss-controlled compound fertilizer as control. Experimental results show that when loss-controlled nitrogen fertilizer is blended with ordinary urea at 4：6, it can effectively increase the plant height, SPAD value, aboveground and underground biomass of maize seedlings, which are 18.79% , 1.18% , 22.39% and 3.32% higher than the control treatment respectively, significantly improved the growth of maize seedlings.