Effects of Fertilization Amount and Planting Density on Main Agronomic Characters and Yield of Tianrun 189 Maize
A new maize variety Tianrun 189 was selected as experimental material,and a two-factor split plot design was adopted.Three treat-ments of density level were set up( A1 treatment 42000 plants/hm2;A2 treatment 48000 plants/hm2;A3 treatment,54000 plants/hm2 ) . 4 fertilizer application level treatments were as follows:B1 was treated with conventional fertilizer, 750 kg/hm2 compound fertilizer and 150 kg/hm2 urea;B2,B3 and B4 treatments were treated with slow-release fertilizer 600,750 and 900 kg/hm2 ,respectively. The main agro-nomic characters,yield and economic benefit of maize variety Tianrun 189 under 3 densities and 4 fertilization levels were studied. Results showed that planting density,fertilizer amount and interaction between fertilizer amount and planting density had significant or extremely signifi-cant effects on plant characters,ear traits and yield. Under different planting densities,A3 had the highest yield of Tianrun 189,was significant or extremely significant higher than treatment A1,but showed no significant differences with A2 treatment. Under different fertilization amount, B4 treatment had the highest yield of Tianrun 189,was extremely higher than B2 treatment,but had no significant differences with B3 and B1. Under the interaction between fertilizer amount and planting density,A3B1 treatment had the highest yield in spring sowing,which reached 8494.50 kg/hm2 and was significantly higher than A3B2 treatment. But A3B4 and A3B3 treatments had no significant differences. In autumn sowing,A3B4 treatment had the highest yield (8276.50 kg/hm2) but had no significant differences with A3B1 and A3B3 treatments. Accord-ing to the economic benefits,benefits of B2,B3 and B4 treatments were all higher than normal application treatment B1,and B3 treatment had the highest benefit,reaching 12353.59 Yuan/hm2,was 10.77％ higher than B1 treatment. In general,proper density of Tianrun 189 was 48000-54000 plants/hm2. Under this density,applying 750-900 kg/hm2 slow release compound fertilizer (N-P2O5-K2O=24-6-10) could obtain better yield and economic benefit.
万方数据
维普
