Abstract: To research the characteristics of response by planting density in each organ yield for different type silage maize,food-forage dual purpose maize Jichengdan 3 and forage maize Zhenjin 31 were used as trial materials under the density of five different levels as 45 000,60 000,75 000,90 000,97 500 plants/ha by randomized block design. The yield contribution by different organ to the whole plant of different silage maize was compared. The result showed that:The main contribution organ of plant yield for Jichengdan 3 was the kernel under the condition of all trial density,the second was the stem and the third was the leaves. Under the density of 45 000 plants/ha and 97 500 plants/ha,the main contribution organ for Zhenjin 31 was the leaves,the second was the stem and the third was the kernel; Under the density of 75 000 plants/ha,the main contribution organ for Zhenjin 31 was the kernel,the second was the leaves and the third was the stem. With the increase of planting density,the yield contribution of stem and leaves presented first down and then up trend; the contribution of the bract,the spike-stalk and the kernel presented first up and then down trend. While with the increase of planting density,the moisture content of stem and leaves presented first up and then down trend,the moisture content of the bract,the spike-stalk and the kernel presented first down and then up trend. The forage yield of the whole plant presented the positive correlation with the yield of straw organ,and the negative correlation with the kernel organ; to all kinds of organ,including the straw organ and kernel organ,there were negative correlation between the yield and the moisture content. Consideration of the highest forage yield,the recommendation of the suitable density was 90 000 plants/ha for Jichengdan 3,and 75 000 plants/ha for Zhenjin 31.

Key words: Silage maize, Forage product organs, Yield contribution, Density control

CLC Number: 

• S513.01