Effet of fertilizer on wheat in saline soil improved by alfafa--II. Its effect on some physiological characters

The results from pot experiments show that N can increase water potentml of flag leaf by about 2．0 bars，chlorophyll content by l3%～8O%(mainly chlorophyll B)，photosyn-thesis rate by about 26%，transpiration rate by about 14%，transpiration efficiency by lO% in saline soil improved by alfafa in Heilonggang Region,Hebei．These effects are more obvious if N and P are applied．These changes of physiological characters are the physiological base for increasing yield by applying N and P in this region．