麦秸还田耕层酚酸变化及其对夏玉米生长的影响

对大田条件下麦秸腐解过程中产生的主要化感物质酚酸的 变化及其对夏玉米吸肥量和产量的影响研究结果表明，秸秆还田可增加土壤中酚酸浓度，秸杆还田后酚酸产生的高峰期在翻埋后40d左右，施N、P化肥处理的土壤中酚酸含量较低，酚酸对夏玉米幼苗根系的生长有明显抑制作用，而对玉米产量及肥料吸收利用的影响不显著。

Changes of the phenolic acid in plough layer and its effects on the growth and yield of summer corn with returning wheat straw

The changes of phenolic acid and its effects on the amount of fertilizers uptake and yield of summer corn are studied being caused by decaying wheat straw in the field.The results show that phenolic acid content is higher in the soil with returning wheat straw,the highest concentration of phenolic acid is observed at about the 40th day after the returning of wheat straw,the phenolic acid content is lower in the soil with fertilizer application,the influences of phenolic acid on the yield and the uptake of N and P is insignificant,but it can inhibit the growth of seedlings' root system.