| Effects of different processing patterns of used plastic film on growth characters and yield of dryland oil flax |
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| DOI：10.7606/j.issn.1000-7601.2013.06.002 |
| Key Words: used film reuse pattern oil flax, growth character yield |
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| Abstract: |
| A field experiment was conducted to investigate the effects of 5 processing patterns of used plastic film on leaf area, dry matter accumulation, net assimilation rate (NAR), relative growth rate (RGR), yield and yield components of dryland oil flax. The results indicated that, compared with the treatment of T6 (collecting used film just after harvest with land preparation and no mulch sowing in the next year), the treatments of T4 (collecting used film with replacement by new plastic film and no tillage sowing in the next year) and T5 (collecting used film with replacement by new plastic film just after harvest and land preparation and sowing in the next year) increased the leaf area significantly during vegetative growth period before flowering, while there was no significant difference among the 6 treatments in and after flowering stage. Total dry matter of oil flax was accumulated rapidly under the treatments of T4 and T5 before flowering, and T5 expressed the highest accumulation after flowering. Meanwhile, dry matter accumulation in stems and leaves also presented an identical trend. NAR varied as a result of different treatments and different growth stages, i.e., it was the highest under T4 in early growth stage but under T5 in late growth stage. RGR under the treatments of T4 and T5 was also increased by 20.45% and 16.12%, respectively, compared to that under the control (T6) during fir shaped stage to budding stage, but that under T5 was the highest in flo
wering stage. All of the 5 processing patterns increased the effective branching number and 1000 grain weight of oil flax, but no significant effect was found in capsule number per plant and seed number per capsule. Under the treatments of T4 and T5, the yields of oil flax were increased by 120.91% and 114.71%, respectively, over the control, but there was no significant difference among the yields of T1 (keeping used film in field with no till sowing on it in the next year), T2 (keeping used film in field with soil covering and no till sowing on it in the next year), T3 (straw mulching on used film just after harvest and straw removing and no mulch sowing in the next year) and the control. In conclusion, the processing pattern of T4 was beneficial to improve the growth rate and dry matter accumulation, and to realize high yield of oil flax; considering the production benefit, T1 was the best choice to reuse plastic film for planting oil flax in arid and semiarid regions. |
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