玉米连作障碍主要因子对苗期玉米生长影响的初步分析

A Preliminary Analysis of Main Influencing Factors on Maize Seedling Growth Under Long Term Continuous Maize Cropping Obstacle

为了明确玉米连作障碍的主要影响因子对苗期玉米生长的影响,模拟玉米连作过程可能的影响因子展开研究,结果表明低浓度的根系分泌物、腐解物、风干物、浸提液和苯甲酸对苗期玉米生长性状的影响不明显,但高浓度的根系分泌物、腐解物、风干物、浸提液和苯甲酸对苗期玉米生长性状的抑制作用较大。也就是说,随着玉米连作年限的增加,对苗期玉米生长的抑制作用越加明显。

To clarify main influencing factors under long-term continuous maize cropping obstacle, research hasbeen carried out according simulation for field continuous cropping. The result showed that root exudates, decom-posed substance, air dry matter, root extract and benzoic acid of low concentration had no more distinct effect onphysiological and growth traits of maize seedling. But, these substances of high concentration had strong develop-ment inhibition to physiological and growth traits in maize seedling. In a word, maize seedling growing was markedlyinhibited with the number of continuous maize cropping years increased.