| Effect of nitrogen fertilization on peanut growth based on the preset SPAD threshold |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2018.06.23 |
| Key Words: SPAD threshold peanuts nitrogen fertilizer N-fixation nodules N use efficiency peanut yield |
| Author Name | Affiliation | | QIU Cai-fei | （Institute of Soil, Fertilizer, Resources, and Environment, Jiangxi Academy of Agricultural Sciences/National Engineering and Technology Center for Red Soil Improvement/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture. P.R.China, Nanchang,330200,China | | SHAO Cai-hong | （Institute of Soil, Fertilizer, Resources, and Environment, Jiangxi Academy of Agricultural Sciences/National Engineering and Technology Center for Red Soil Improvement/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture. P.R.China, Nanchang,330200,China | | PENG Chun-rui | （Institute of Soil, Fertilizer, Resources, and Environment, Jiangxi Academy of Agricultural Sciences/National Engineering and Technology Center for Red Soil Improvement/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture. P.R.China, Nanchang,330200,China | | QIAN Yin-fei | （Institute of Soil, Fertilizer, Resources, and Environment, Jiangxi Academy of Agricultural Sciences/National Engineering and Technology Center for Red Soil Improvement/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture. P.R.China, Nanchang,330200,China | | CHEN Jin | （Institute of Soil, Fertilizer, Resources, and Environment, Jiangxi Academy of Agricultural Sciences/National Engineering and Technology Center for Red Soil Improvement/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture. P.R.China, Nanchang,330200,China | | GUAN Xian-jiao | （Institute of Soil, Fertilizer, Resources, and Environment, Jiangxi Academy of Agricultural Sciences/National Engineering and Technology Center for Red Soil Improvement/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture. P.R.China, Nanchang,330200,China | | XIE Jiang | （Institute of Soil, Fertilizer, Resources, and Environment, Jiangxi Academy of Agricultural Sciences/National Engineering and Technology Center for Red Soil Improvement/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture. P.R.China, Nanchang,330200,China |
|
| Hits: 1747 |
| Download times: 887 |
| Abstract: |
| To explore the use of peanut leaf SPAD value to estimate nitrogen status of peanuts in real-time and non-destructive diagnosis for guiding nitrogen fertilization of peanut, we preset the third leaf SPAD value after peanut emergence at 30, 45, 60, 75 d, and 90 d，and designed SPAD corresponding N fertilization for days of 30~33, 38~41, 42~45, 44~47 d, and 43~46 d. There was 3 designs as SN-1, SN-2, and SN-3. We also studied the effect of different nitrogen management programs on peanut nitrogen fixation, nitrogen use efficiency, and its yield. The results showed that, SN-3 threshold was set too high so it was not conducive to the peanut growth. The SN-1 and SN-2 were more optimal and promoted peanut N-fixation nodule growth, improved N efficiency and peanut yield. Comparing with the conventional fertilization, the SPAD threshold for SN-1 design was the best and resulted in 17.65% and 4.35% increases in single nodule volume and weight of peanut root, respectively and 19.36% and 3.99% increase in N use efficiency and N agronomic use efficiency, 12.95% increase in peanut yield. Therefore, the preset SPAD value for SN-1 can be used as N management guidance at each growth stage of peanut production in the region. |
|
|
|