腐植酸类水稻育秧剂适宜酸度研究

2006年3月至5月在辽宁普天同乐肥业有限公司试验基地安排了腐植酸水稻育秧剂适宜酸度试验,并与抚顺育秧剂进行对比。结果表明,腐植酸水稻育秧剂能增加株高、根长、叶片长、叶片宽和基茎粗,分别比对照增加4.17%～12.28%,1.03%～6.63%,3.05%～9.91%,1.30%～13.64%,3.09%～8.25%;根鲜重、茎叶鲜重、根干重、茎叶干重、总鲜重和总干重分别比对照增加12.36%～47.19%,11.76%～30.15%,25.00%～37.50%,8.82%～29.41%,12.00%～36.00%,14.00%～30.00%;根系的总吸收面积和活跃吸收面积分别比对照增加12.15%～74.24%和12.54%～74.49%。试验结果表明,利用中性和弱酸性草甸土育苗,腐植酸育秧剂适宜pH值为4或5。

Research on Suitable Acidity of Rice Seedling Growth Medium Contained Humic Acid

From March to May 2006, the study on the suitable acidity of rice seedlings fertilizer contained humic acid was conducted in the experiment base of Liaoning Putian Tonglc Fertilizer Co. LTD, and compared with Fushun rice seedlings fertilizer. The results showed that, compared with CK, the rice seedlings fertilizer contained humic acid could increase the plant height, the length of root and leaf, the width of leaf, the thickness of base stem by 4.17%-12.28%, 1.03%-6.63%, 3.05%-9.91%, 1.30%-13.64%, 3.09%-8.25%, respectively. Meantime, it could increase the fresh weight of root, stem and leaf, total fresh weight and total dry weight by 12.36%-47.19%, 11.76%-30.15%, 25.00%- 37.50%, 8.82%-29.41%, 12.00%-36.00%, 14.00%-30.00%, and enhanced the total absorbing area and the roots actively absorbing area by 12.51%-74.24% and 12.54%-74.49%,tespectivcly. These results indicated that the suitable acidity of rice Seedlings fertilizer contained humic acid is 4 or 5 under the condition of using neutral acid and weak acid of grassy marshland soil as seedbed soil.