| Nutrient input and fertilizer production efficiency analysis for dry-cultivation spring maize in dryland of Liupanshan area |
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| DOI：10.7606/j.issn.1000-7601.2018.04.06 |
| Key Words: spring maize nutrient input efficiency of fertilizer dryland |
| Author Name | Affiliation | | XIA Hai-xue | Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China
Chinese Institute of Water-Saving Agriculture Research in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHEN Xue-jiao | Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHANG Xu-dong | Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHAO Ji | Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | YANG Lin | Guyuan branch of Ningxia agriculture and forestry academy
Guyuan,Ningxia 756000,China | | ZHANG Peng | Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | HAN Qing-fang | Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China
Chinese Institute of Water-Saving Agriculture Research in Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to explore the nutrient input and efficiency of fertilizer use of maize production in semi-arid region. A three-year consecutive investigation and analysis was carried out in Liupanshan area. The result showed that: (1) Average input of pure N, P2O5, and K2O fertilizer in maize production were 323.7 kg·hm-2, 210.1 kg·hm-2 and 28.6 kg·hm-2 respectively; The ratio of pure N, P2O5, and K2O fertilizer was 1:0.64:0.08, The the proportion of Pfertilizer was higher, and K fetilizer was lower; (2) Dosage of N and P fertilizer were higher, and the percentage of farmers who applied fertilizer higher than 330 kg·hm-2 and 165 kg·hm-2 of N and P fertilizer were 48.5% and 70.1% respectively, which was a waste and would cause environment pollution; Use of KFertilizer was lower, the percentage of K fertilizer application was lower than 42 kg·hm-2 was as high as 69.3%. The topdressing fertilizer was mainly urea, and its average dosage was 121.9 kg·hm-2, the ratio of basal and topdressing fertilizer was approximately 6∶4, which suited maize growth. But the individual topdressing dosage had two extreme, in most cases it was very high or very low. (3) The average yield of maize in research area in three years was 9 864 kg·hm-2. Due to the poor rainfall and irrational fertilizer application from 2013 to 2015, the maize yield declined year by year;(4) The PFP(Partial fertilizer productivity ) of pure N, P2O5, and K2O fertilizer was 30.7 kg·kg-1, 47.8 kg·kg-1 and 391.3 kg·kg-1 respectively in the three years, the PFP of pure N, P2O5 were lower. The input of organic fertilizer in the research area was mainly cow and sheep dung, and it’s low. In conclusion, in Liupanshan area, the input dosage and proportion of fertilizer were irrational, which need a scientific guidance and adjustment. |
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