Maize yield and growth on waste substrate in organic ecotype soil free cultivation

The effect of waste matrix produced from organic ecotype soilless cultivation then returned to soil on botanical characteristics, yield and economic benefit of maize (Zea mays) seed production and the soil properties of available potassium, phosphorus and alkalihydrolyzable N were studied using a randomized block experiment in this paper. The result showed that the maize seed yield of T1 (4 m3 waste matrix +N24P12K6) was the highest; yields between T3 (4 m3 waste matrix +N6P3K1.5 ) and Control (N24P12K6) did not show a significant difference. Spike grain weight, 100seed weight and yield of T1increased by 7.3 g, 2.03 g, 2.07 kg compared to Control, respectively. Soil organic matter, available potassium, available phosphorus and alkalihydrolyzable N in T1 increased by 0.4 gkg-1, 24.61 mgkg-1, 0.68 mgkg-1, 0.65 mgkg-1 compared to Control, respectively. The income of T3 increased by 1 791.6 CNYha-1 and the chemical fertilizer investment reduced by 2 207.8 CNYha-1 compared with Control by the organic ecotype waste matrix. However, soil chemistry properties and maize botanical characteristics did not show significant differences between treatments.