Effects of Nitrogen and Sulfur Interaction on Growth and Nutrient Absorption at Maize Seedlings
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Abstract:
The effects of nitrogen and sulfur interaction on plant growth and nutrient uptake in maize seedlings were studied by a pot experiment. The results showed that nitrogen application and sulfur application had an impact on the growth and nutrient uptake of maize seedlings, and interaction between the two was significant. The plant height, stem diameter, SPAD value, net photosynthetic rate, dry matter accumulation and nitrogen accumulation of N2 treatment were higher significantly than those of N0 treatment with different value of 48.7%, 30.0%, 28.3%, 18.5%, 47.4% and 285.3%, respectively. Furthermore, above parameter indexes of N1 treatment were lower than N2 treatment as well as higher than N0 treatment. Sulfur application significantly promoted the growth of maize seedlings, and showing interaction effect of nitrogen and sulfur significantly. Without nitrogen fertilization(N0), sulfur application significantly raised the dry matter accumulation of plant. Under low nitrogen condition(N1), maize growth and nitrogen uptake were promoted with sulfur application; Under high nitrogen condition(N2), the sulfur fertilization effect was similar to that of low nitrogen application. In conclusion, superior dry matter accumulation, the highest sulfur utilization and superior nitrogen utilization were observed in N2S1 treatment. Therefore, N2S1 fertilization is the most effective nitrogen and sulfur nutrition management measure for maize seedlings growth.