| Rapeseed is an important oil crop, with winter rapeseed planting was northward, westward expansion trend,Northwest winter rapeseed acreage increased year by year, so the impact of drought and frost damage is also more. To solve this problem, rape covered technology is developing rapidly. Plastic film covering technique can not only solve the problem of water shortage in winter oilseed rape, and able to provide a good environment for the growth, improve soil temperature, thus solving the problem of frost damage oilseed rape. But with the rapid development of technology, mulching, plastic film adverse effects on the soil and the environment is also a growing concern. For the harm plastic film in recent years, the rapid development of degradable plastic film mulching technology, this paper discusses the impact of biodegradable membranes Winter Rape of the indicators.In this paper, the test set ridge cover ordinary film(LP) by field, ridge cover biodegradable film(LJ) and trench cover ordinary film(GP) and no mulching(CK) 4 treatments, systematic analysis and comparison of different types of mulching influence of underground 5cm, 15 cm and 25 cm soil temperature at a depth, 0 ~ 30 cm, 0 ~ 50 cm and 0 ~ 100 cm depth soil water storage, winter oilseed rape growth and physiological indexes, yield, water use efficiency and grain weight. The results showed that:1. In different film treatments on winter oilseed rape soil temperature and soil moisture contentAfter seeding 120 DAS front, LP and LJ handle increased temperature, preserving soil moisture has the same effect, they were significantly higher than CK, after sowing 120 DAS, the is gradually degraded bio-film, which increases the temperature, Soil Moisture significantly lower than the LP. The GP process layers are slightly higher than CK geothermal process, higher than CK of 0.3 ~ 0.8 ℃. 120DAS(earlier biodegradable film is not degraded), soil moisture content LP process and LJ treated basically the same trend is also consistent soil moisture content After 120 DAS LJ process is significant differences with the LP. Soil moisture GP treatment compared with CK treatment is slightly higher, but the difference was not significant.2. Effects of Different Mulching Treatment of Winter Rape Growth Index(1) plant height, stem diameterLP treatment, LJ treatment, GP winter oilseed rape treatment plant average height increased by 16.56%, 11.95% and 5.68% than CK; LP treatment and LJ have significantly differentt with CK, GP and CK treatment difference of plant height,but not obvious.T he average show winter oilseed rape stem diameter of LP treatment 10.90% higher than LJ treatment, 7.21% higher than GP treating a, and 5.64% than CK.(3) LAI,the amount of dry matterLAI winter oilseed rape parabola type and maximum at Florescence.LP treatment LAI 23% higher than CK and the difference was significant, 15% higher than GP treatment and the difference was significant, while the LP treatment was only 3% higher than the LJ treatment and the difference was not significant. LP treatment, LJ treatment dry winter oilseed rape was close, no significant difference;3. Impact of different coating film treatments on physiological indexes of winter oilseed rapeChlorophyll content of each performance: LP treatment> LJ treatment> GP treatment> CK treatment. The highest content of chlorophyll LP treatment was GP treatment.LP treatment average photosynthetic rate 11% higher than CK, and the difference was significant, and 9% higher than GP, the difference was significant, 3% higher than the LJ treatment, but the difference was not significant.4. Different Mulching Treatment of winter oilseed rape yield, water use efficiency have a significant effectLJ treatment(5563kg / hm2)> LP treatment(5426kg / hm2)> GP treatment(4457 kg / hm2)> CK treatment(4331 kg / hm2). Water consumption: CK treatment(397mm)> GP treatment(387mm)> LJ treatment(367mm)> LP treatment(344mm). Water Utilization: LP significant differences and LJ treatment, GP and CK treatment had significant difference.Harvest index of each treatment was not significantly different, so as the fertilizer partial productivity. LJ, LP treatment was significantly higher than GP treatment in grain weight, and significantly higher than CK treatmenOverall, the ridge planting winter rapeseed, winter oilseed rape ridge cover film growth, yield better results than the trench mulching; effects from the application, the biodegradable film can replace ordinary film increased temperature, soil moisture, increase savings water effects. |
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