大豆连作障碍调控剂的筛选

对促根剂和硝酸钙的施用效果做了初步研究 ,结果表明 :促根剂和硝酸钙对大豆生长发育、干物质积累、抗逆性及产量的影响有所不同 ,表现在 :促根剂显著增加了大豆植株的干物质积累 ,增强了根系活力 ,而硝酸钙的影响则不规律 ;促根剂增强了大豆植株的抗逆性 ,而硝酸钙的影响则有增有减 ;促根剂和硝酸钙均使大豆产量增加 ,但促根剂的效果更为显著。从综合效应分析来看 ,促根剂对大豆生长发育、干物质积累都有较好地促进作用 ,能够增强大豆植株的抗逆性 ,对抑制连作大豆减产有较好的效果

SELECTION OF REGULATING AND CONTROL AGENTS ON THE BARRIER OF SOYBEAN UNDER CONTINUOUS CROPPING

Preliminary research on the effect of the Roots Growth Promoting Agent(RGPA) and Calcium nitrate was conducted. The results showed that the effects of the RGPA and Calcium nitrate on soybean growth, accumulation of dry matters, resistance to adversity and soybean yield were different. The RGPA increased the accumulation of dry matters of soybean plants significantly and enhanced the root activities, but the effects of Calcium nitrate was irregularity; the RGPA enhanced the resistance to adversity of soybean plants, but the effects of Calcium nitrate was neither increasing nor decreasing. The RGPA and Calcium nitrate all increased the yield of soybean, but the result of the RGPA was larger than that of Calcium nitrate. Depending on the results of comprehensive effect analysis, the RGPA increased the soybean growth and accumulation of dry matters significantly, and enhanced the resistance to adversity of soybean plants. The results on inhibition of the soybean yield decreasing under continuous cropping were quite good.