| Effects of simulated plow pan on accumulation, transportation and distribution of dry matter in spring maize |
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| DOI：10.7606/j.issn.1000-7601.2017.02.08 |
| Key Words: spring maize plow pan subsoiling dry matter accumulation dry matter distribution |
| Author Name | Affiliation | | CAO Qing-jun | Jilin Academy of Agriculture Science/Key Laboratory of Northeast Crop Physiological Ecology and Cultivation, Ministry of Agriculture in People's Republic of China, Changchun, Jilin 130033, China
Northeast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun, Jilin 130102, China | | LI Gang | Jilin Academy of Agriculture Science/Key Laboratory of Northeast Crop Physiological Ecology and Cultivation, Ministry of Agriculture in People's Republic of China, Changchun, Jilin 130033, China | | YANG Fen-tuan | Jilin Academy of Agriculture Science/Key Laboratory of Northeast Crop Physiological Ecology and Cultivation, Ministry of Agriculture in People's Republic of China, Changchun, Jilin 130033, China | | SONG Feng-bi | Northeast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun, Jilin 130102, China | | JIANG Xiao-li | Jilin Academy of Agriculture Science/Key Laboratory of Northeast Crop Physiological Ecology and Cultivation, Ministry of Agriculture in People's Republic of China, Changchun, Jilin 130033, China | | CHEN Xi-feng | Jilin Academy of Agriculture Science/Key Laboratory of Northeast Crop Physiological Ecology and Cultivation, Ministry of Agriculture in People's Republic of China, Changchun, Jilin 130033, China |
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| Abstract: |
| A pot experiment with PVC tube was conducted to investigate the effects of simulation plow pan and subsoiling on the accumulation, transportation and distribution of dry matter in spring maize. The results indicated that the dynamic change of dry matter accumulation in different days after emergence could be well fitted by the model of Richard's equation (r=0.9987～0.9991). The maximum growth rate and active growth duration days under plow pan were significantly lower than those under subsoiling, showing that plow pan limited the development of maize, and also inhibited the dry matter accumulation in above-ground parts and its distribution to different organs. The total amount of dry matter distributed to different organs at maturity under plow pan was significantly lower than that under subsoiling. On the contrary, the ratio of dry matter distributed to stem under plow pan was significantly higher than that under subsoiling, which demonstrated that the amount and rate of dry matter transfer from stem to kernels were reduced by the existence of plow pan, resulting in the reduce of grain yield per plant consequently. In conclusion, breaking plow pan by deep subsoiling is an important measure to achieve high yield of spring maize in Northeast China at present. |
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