| Effect of root pruning in different depth on height of alfalfa growth |
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| DOI：10.7606/j.issn.1000-7601.2010.02.17 |
| Key Words: root pruning plant height growth dynamic alfalfa |
| Author Name | Affiliation | | YONG Xiaohua | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | JIA Zhikuan | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | HAN Qingfang | Research Center of Agriculture in Arid and Semiarid Areas, Northwest A & F University, Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Study was made on the growth situation of alfalfa root in the different soil depths after cutting lateral root. The results showed that in the current year of cutting lateral root, alfalfa height growth was inhibited and decreased compared with the control. Alfalfa root in the shallow depths (20 cm, 40 cm and 60 cm depths) treatment had more serious water stress, than other treatments. There were very significant differences(P<0.01) between the early stage of cutting lateral root and the control. In the harvest period, plant height decreased by 13.10 cm, 12.85 cm and 11.30 cm compared to the control respectively. It showed that the shallower the root cutting was made, the more seriously it affected alfalfa. In the second year of cutting lateral root, the alfalfa height curve is very flat in the green stage. In the harvest period of cutting lateral root at 20 cm, 40 cm and 60 cm depths, the plant height decreased by 5.08 cm, 5.34 cm and 5.30 cm compared to the control(37.96 cm) respectively. The differences were significant (P<0.01). The data in two years showed that the alfalfa height growth in shallow level treatments was more seriously affected by water stress than other treatments. The level of alfalfa inhibition growth of different soil layers by different cutting lateral root is shallow level treatment＞medium level treatment＞deep treatment. |
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