| Coupling effect of water and fertilizer on dry matter distribution and yield of dryland broomcorn millet |
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| DOI：10.7606/j.issn.1000-7601.2014.01.023 |
| Key Words: broomcorn millet coupling effect of water and fertilizer dry matter distribution |
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| Abstract: |
| Using Jinshu 7 as material, we studied the coupling effect of water and fertilizer treatment on photosynthesis, dry matter distribution, and yield of broomcorn millet. The results showed that leaf area and rate of net photosynthesis increased first and then decreased. Leaf area reached maximum at heading stage, whereas net photosynthesis was highest at flowering stage. The distribution of the dry matter in the leaf was higher than that in the stem. The translocation rate of dry matter for the leaf and the stem was highest for the nitrogen rate of 150 kg·hm-2, phosphorus urea rate of 120 kg·hm-2, or water-keep agent urea at 60 kg·hm-2. The yield was highest when the nitrogen urea was applied at the rate of 150 kg·hm-2, phosphorus urea 120 kg·hm-2, water-keep agent urea 60 kg·hm-2. Yield was positively correlated with panicle number, ear weight per plant, and ear length, with the correlation coefficients being 0.88, 0.80, and 0.7, respectively. The yield increased with fertilizer for a certain range. It is recommended that rate of 150 kg·hm-2 for nitrogen, 120 kg·hm-2 for hosphorus, and 60 kg·hm-2 for water-keep agent urea should be used for dryland broomcorn millet production. |
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