| Effect of nutrient type soil improvement agents on soil physical and chemical properties and maize economic benefits |
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| DOI：10.7606/j.issn.1000-7601.2014.04.025 |
| Key Words: nutrient type of soil improvement agents soil physical and chemical properties water storage maize |
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| Abstract: |
| The experiments were conducted to study the effects of nutrient type of soil improvement agents on the physical and chemical properties of soil, water storage and economic benefits of maize based on an eight-year maize field in the Jiuquan, Gansu province. The results showed that soil porosity, aggregate structure, field capacity and holding capacity decreased with the increasing of the application amounts of soil improvement agents. The rate of soil improvement agents was positively correlated with organic matter, alkali N, available P, available K and CEC, whereas was negatively correlated with bulk density and pH value. With the increase in soil improvement agents, maize grain yield increased, while the marginal benefit decreased. Regression analysis showed that the best application amount of this nutrient type of soil agents be 1 349.96 kg·hm-2, resulting in the theoretical yield of maize of 7 080.00 kg·hm-2. |
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