Abstract: Micro-climatic effects of the intercropped peanut with wheat(IP)and its influence on peanut growth and development were studied by comparing with pure-grown peanut(PP).The results showed that:1) The light intensity at both the soil surface and the top of the canopy in the IP field was less than that in the PP field,which was about 50% and 75% of PP field respectively.However,the differences of the light intensity between IP and PP fields decreased with the growing and development of the peanut.2) Average ground temperature at 10 cm in the IP field was higher than that in the PP field,while the average temperature at the top of the canopy in the IP field was lower than that in the PP field.3) The bulk density of the surface soil in the IP field was higher than that in the PP field,while the soil water content at each soil layer in the IP field was lower than that in the PP field.4) The maximum Leaf Area Index(LAI) by IP was smaller than that by PP,while the time of the maximum LAI reached was later than that by PP.Therefore,the relative greater green leaf areas were hold by the IP at the late growing stages of the peanut.5) The accumulating amounts and rate of the dry-matter were different in different organs between IP and PP.The reproductive growth of the IP was delayed,and total yield of IP was lower than that of PP.6) The maximum Crop Growth Rate(CGR) by IP was greater than that by PP,however,the time of the maximum CGR reached by IP was later than that by PP.The changes of the Net Assimulation Rate(NAR) both for IP and PP were same and showed a decreased trend.The Leaf Area Duration(LAD) by IP during the pod filling stage was higher than that by PP.

Key words: Intercropped peanut, Intercropped peanut, Field micro-climate, Leaf area index, Dry matter