| Analysis for the feasibility of achieving high yield and nutrient efficiency at low fertilizer input |
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| DOI：10.7606/j.issn.1000-7601.2011.01.24 |
| Key Words: grain yield nutrient use efficiency low fertilizer input |
| Author Name | Affiliation | | ZHOU Ling | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Zhaohui | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | XUE Cheng | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Shengxiu | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Overuse of chemical fertilizer has led to both high production costs and serious risk of environmental pollution. Therefore, reduction of fertilizer input while increasing its efficiency will be crucially important for sustainable agriculture. This paper compared chemical fertilizer rates and grain yield of the main crops in different countries, analysed the typical instances that decreased fertilizer use did not lead to obvious reduction of crop yield in western European countries, and found that high grain yield with high nutrient use efficiency could be realized at the same time by rational nutrient management. Based on the successful experience abroad and the agricultural practice in China, we found that balancing nutrient supply, fully use of nutrients other than that from fertilizers and further exploring the biological potential of crops are three important ways for realizing high grain yield with high nutrient use efficiency. Nowadays, basic research is urgently needed for decreasing chemical fertilizer input, and comprehensive management on nutrient resources should be enhanced at the same time. |
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