| Study on principle of dry matter accumulation and distribution in rape under different field mulching and planting patterns |
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| DOI：10.7606/j.issn.1000-7601.2012.03.05 |
| Key Words: rape field mulching dry matter accumulation distribution principle |
| Author Name | Affiliation | | ZHAO Dongxia | College of Agronomy, Gansu Agricultural Unisersity, Lanzhou,Gansu 730070, China | | NIU Junyi | College of Agronomy, Gansu Agricultural Unisersity, Lanzhou,Gansu 730070, China | | YAN ZhiIi | Hebei Normal Unieersity of Science & Technology, Qinhuangdao,Hebei 066004, China | | ZHANG Dongli | Zhangye Cash Crop Technique Popularization Statian, Zhangye, Gansu 735000, China | | ZHANG Yanming | College of Agronomy, Gansu Agricultural Unisersity, Lanzhou,Gansu 730070, China | | YU Xingfang | College of Agronomy, Gansu Agricultural Unisersity, Lanzhou,Gansu 730070, China |
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| Abstract: |
| A pot experiment was conducted to study mulching and planting techniques suitable to local climatic conditions in the spring rape field of dry mountainous areas of western China. The effects of five field mulching and planting patterns including full plastic-film mulching on double ridge and planting in catchment furrows(QL), full plastic-film mulching and parallel sowing(QF), film mulching on ridge and planting in film side(MC), half plastic-film mulching and parallel sowing(BM) and wheat straw mulching and parallel sowing(MF)on dry matter accumulation and distribu-tion were compared with no mulching and flat planting(CK). The result indicated that the impact of different field mulching and planting patterns on dry matter distribution ratio of rape organs varied, and QL and QF were most signifi-cant in comparison with CK. All mulching modes were helpful for dry matter accumulation, but the effects of different
mulching modes also varied. The growth rate of per plant dry weight and yield of rape under QL and QF were the high-est, but not significantly under MF. Per plant dry weight and yield presented a positive correlation, and the optimum linear regression equations was built. Plastic-film mulching effectively promoted the transfer of photosynthate from stems and leaves to pods, and increased above ground dry matter accumulation and yield.Compared with CK,QL and QF in-creased the yield by over 30%, which should be widespreadly popularized in produetion. |
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