土壤肥水热状况与玉米根系及地上部生长发育关系的研究

试验结果表明，地膜覆盖和浅施有机肥可以使玉米根长和根干重在自然生长过程中的Ｓ型曲线发生改变，根系在土壤中上层的分布比例有所增加；单株干物质积累向生殖器官转移较快，成熟期产量较高。研究发现，提高地温与玉米２叶期的干物质积累有显著相关，３至５叶期没有相关性，而土壤水分却极大地影响玉米根系及地上部的生长发育。

The Effects of the Fertility,Moisture Content and Temperature of Soil on the Root System and Top of Maize

The results of experiment showed that plastic mulching and shallow applicattion of organic fertilizer changed the growing curve of maize root system. The ratio of root in shallow soil was increased and the nutrient content was transported quickly into reproductive organs, so the yield of maize was higher. It was found that there was a significant correlation between the dry matter weight of root and top of maize and soil temperatur at 2-leaf stage, but the correlation was not significant at 3-leaf stage or 5-leaf stage. Soil moisture content affected significantly the growth of root and top of maize.