| Effects of cottonseed meal humic acid fertilizer on soil water-stable aggregates, soil enzymes and soil nutrition |
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| DOI：10.7606/j.issn.1000-7601.2017.04.09 |
| Key Words: humic acid fertilizer soil water-stable aggregates soil enzymes soil nutrition |
| Author Name | Affiliation | | PANG Qing-yang | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China | | XUAN Yu-long | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China | | CAI Xu | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China | | WANG Ya-ge | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China | | LI Wan-tao | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China | | WANG Kai-yong | College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| A field experiment was conducted to identify the effect of cottonseed meal, a water-soluble humic acid fertilizer, on soil aggregates, enzymes and nutrients. Spring 38 was used as the test wheat variety, and three treatments—CK, equal nutrients compound fertilizer and equal nutrients cottonseed meal humic acid compound fertilizer—were designed in the experiment. The results are as follows. Compared with CK, in the treatment of humic acid fertilizer, percentage composition of soil aggregates at different levels transferred to aggregates (2～0.25 mm and>2 mm), soil urease activity, the activity of catalase and alkaline phosphatase increased significantly, and there was no significant difference in sucrase activity. Humic acid compound fertilizer increased the soil alkaline hydrolysis nitrogen, available potassium and available phosphorus content at 0～20 cm soil layer by 37.27%, 37.02% and 42.24% respectively in the whole growth stage. And it increased the soil alkaline hydrolysis nitrogen, available potassium and available phosphorus content at 20～40 cm soil layer by 15.55%, 57.36% and 61.52% respectively. Compared with equal nutrients compound fertilizer, equal nutrients cottonseed meal humic acid compound fertilizer transferred percentage composition of soil aggregates at different levels to aggregates (2～0.25 mm and >2 mm), improved the activity of soil urease, catalase and alkaline phosphatase, and there was no significant difference in sucrose activity. Compared with equal nutrients compound fertilizer, humic acid compound fertilizer increased the soil alkaline hydrolysis nitrogen by 5.92%, available potassium by 4.29% and available phosphorus by 8.8% at 0～20 cm soil layer, and alkaline hydrolysis nitrogen by 1.9%, available phosphorus by 15.39%, available potassium by 8% at 20～40 cm soil layer in the whole growth stage. |
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