Effects of film mulching and fertilization on agronomic characters of 4 peanut（Arachis hypogaea L）cultivars

Forteen agronomic characters of peanut were analyzed using the double factor variance analysis， correlation analysis and principal component analysis under film mulching cultivation with fertilization，film mulching cultivation without fertilization and open cultivation with fertilization conditions. The result showed that：（1）Under film mulching cultivation，fertilization treatment had significant influence on 7 agronomic characters of 4 peanut cultivars， and the 100-kernel weight of Huayu 39 was significantly lower than that of other 3 peanut cultivars. Film mulching treatment had no significant influence on 14 agronomic characters of 4 peanut cultivars under fertilization and weeding， but the kernel percentage of Tianfu 28 was lower than that of other 3 peanut cultivars.（2）Correlation analysis indicated that the number of agronomic characters correlated with plant height and 100- kernel weight under the 3 treatments was the most.（3）Principal component analysis showed that the cumulative contribution rate of the 2 principal components under the 3 treatments was 86.39%，91.14%and 85.31%，respectively. There were differences on the 2 principal components under the 3 treatments，however，all of load value of plant height，pod number per plant and 100- kernel weight were high. Above all，more attention should be paid on the plant height and 100- kernel weight in future of peanut breeding.