The Control Effects of Multifunctional Soil Addition Agent on Soil-born Disease of Wheat and Its Decomposing Effects on Corn Stalks

LI Haiyan; SU Yuan; QI Yongzhi; ZHAO Bin; ZHEN Wenchao?

Abstract：In order to clarify the function of multifunctional soil addition agent HAD-5,the control effect of the multifunctional soil addition agent on the soil-born disease of wheat,its decomposing effect on corn stalks and the effects on the growth and yield of wheat were studied in three experiment stations from 2012 to 2014. The results showed that, from overwintering stage to jointing stage,the control effects of HAD-5 on common rot and take-all were significantly lower than those of 3% difenoconazole seed coating agent and 2. 5% fludioxonil seed coating agent,respectively. There was no significant difference between the control effects of HAD-5 and 6% tebuconazole seed treatment suspension agent on wheat sharp eyespot at jointing stage. At maturity stage, the control effects of HAD-5 on wheat sharp eyespot and common rot were 71. 2% and 68. 9%,respectively,with no difference from those of the drug controls. But the control effect of HAD-5 on take-all (55. 6%) was significantly lower than that of fludioxonil seed coating agent. In Dingxing,Zaoqiang and Xianxian counties,the accumulative degradability rates of HAD-5 to corn stalks were 62. 34%,61. 45% and 63. 33%,respectively. The accumulative degradability rates of corn stalks in the three stations increased by 19. 36%,32. 89% and 19. 88% compared with those of decomposition agent treatments, and increased by 37. 59%,42. 11% and 37. 29% compared with those of the blank control. The wheat plant height, number of secondary roots and the yield were improved by HAD-5. The average yields in three stations were 7 124. 7 kg/ha,7 116. 2 kg/ha and 6 737. 4 kg/ha,respectively,and significantly higher than that of the blank control with the increase rates of 10 . 7%,12 . 3% and 5 . 2%.