| Effect of long-term fertilization on crop yields and nutrition accumulative recovery rates in Loessial soils region |
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| DOI：10.7606/j.issn.1000-7601.2017.01.09 |
| Key Words: long-term fertilization Loessial soils crop yield nutrient recovery rate |
| Author Name | Affiliation | | E Sheng-zhe | Institute of Soil and Fertilizer and Save water Agricultural, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China
Institute of Enviroment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | YANG Zhi-qi | Tianshui Academy of Agricultural Sciences, Tianshui, Gansu 741000, China | | LUO Zhao-xia | Tianshui Academy of Agricultural Sciences, Tianshui, Gansu 741000, China | | YUAN Jin-hua | Institute of Soil and Fertilizer and Save water Agricultural, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | CHE Zong-xian | Institute of Soil and Fertilizer and Save water Agricultural, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | WANG Ya-nan | Institute of Enviroment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | ZENG Xi-bai | Institute of Enviroment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | GUO Yong-jie | Institute of Soil and Fertilizer and Save water Agricultural, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Long-term fertilization experiment that established on Loessial soils lasted nearly for 30 years in Tianshui city of Gansu province was conducted to study the effects of long-term fertilization on crop yields and accumulative nutrient recovery rates. The results showed that long-term application of chemical fertilizers and manure significantly increased wheat, canola, flax grain yields and wheat yields stability between years, combined applying chemical fertilizers and organic manure applying combined with chemical fertilizer resulted in higher and stable yield performance. The yields increased by nitrogen (N), nitrogen and phosphorus (NP), nitrogen, phosphorus and potassium (NPK) gradually increased with time, moreover, there were notable positive correlation between yields and times in NP, NPK, MNP and MNPK treatments. The mean wheat yields increased by N, NP and NPK were 745, 1 413 kg·hm-2 and 1 474 kg·hm-2, manure application meanly increased wheat grain yield by 984 kg·hm-2. In all treatments the highest accumulative nitrogen and phosphorus recovery rates appeared in NP and NPK treatments, being 44.35%, 44.55% and 15.11%, 15.35%, respectively. Manure application significantly reduced accumulative nitrogen and phosphorus recovery rates, MNP and MNPK treatments nitrogen and phosphorus accumulative recovery rates were 30.41%, 32.07% and 9.95% and 9.70%, respectively. The highest potassium accumulative recovery rate of 14.25% appeared in NPK treatment, manure application also significantly reduced potassium recovery rate. |
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