不同程度刈割对无芒稗营养元素(N)生殖分配的影响  

Effects of Different Mowing Degrees on Reproductive Allocation of Nutrient Elements( N) in Echinochloa crusgalli

作　　者：张阳阳 屈楠 马钢 ZHANG Yang-yang;QU Nan;MA Gang(Yan＇ an Branch of Shaanxi Provincial Land Engineering Construction Croup Co.,Ltd.,Yan＇ an,Shaanxi 716099;Xinjiang Branch Office of Shaanxi Provincial Land Engineering Construction Croup Co.,Ltd.,Urumchi,Xinjiang 830011;College of Agriculture,Shenyang Agricultural University,Shenyang,Liaoning 110866)

机构地区：[1]陕西省土地工程建设集团有限责任公司延安分公司,陕西延安716099 [2]陕西省土地工程建设集团有限责任公司新疆分公司筹备处,新疆乌鲁木齐830011 [3]沈阳农业大学农学院,辽宁沈阳110866

出　　处：《安徽农业科学》2018年第24期132-134,176,共4页Journal of Anhui Agricultural Sciences

摘　　要：[目的]研究不同程度刈割对无芒稗营养元素(N)生殖分配的影响。[方法]从生殖生态的角度出发,以稻田恶性杂草无芒稗为研究对象,通过盆栽试验探讨在不同程度刈割处理条件下无芒稗N素生殖分配的格局以及生育时期内的动态变化规律。[结果]随着生长发育时期的延长,各处理条件下,无芒稗根、茎、叶中的N素含量及分配比例由花期到果期呈现出下降的趋势,花或果中的N素及分配比例呈现相反趋势;花期无芒稗各器官中N素含量均随刈割强度的增加呈下降趋势,而生殖分配比例无明显变化;果期无芒稗营养器官中的N素分配及含量在刈割1/2强度下较其他处理高,刈割1/4强度对N素在生殖器官中的分配具有显著的促进作用。[结论]该研究为农田杂草的防除提供科学依据,提高作物产量,促进农业可持续发展。[Objeetive] To study the ettects of dittbreent mowing degrees on reepmduetive allocation of nutrient elements （N） in Echitmchloa crus- galli.[ Method] From the pel, pective of reproductive ecology, vicious weeds-E.crusgalli were the main research objects ,through pot experiment to discuss the reproductive allocation pattern and dynamic change rule in diflblent lepmductive stages of nutrient element N under ditterent mowing deglees. [ Result ] With the extension of growth and development period, under the condition of each test treatment, N content and distribution proportion in roots, stems, leaves of E. crusgalli showed a downward tlend from the flowering stage to ti＇uit stage, which was opposite to N content and distribution proportion in flower/fruit. N content of each organ of E. crusgalli in flowering stage showed the tlend of decline with the inmease of mowing deglees, while thele was no significant change in lepmductive allocation. In fruiting stage, the content and distribution of N element in vegetative organs with cutting 1/2 was higher than other treatments, and cutting 1/4 can significantly promote the distribution of N element in re- productive organ. [ Conclusion ] This study provides scientific basis for the plevention and elimination of weeds in farmland, improves crop yield and promotes the sustainable development of agriculture.

关 键 词：刈割 无芒稗 营养元素(N) 生殖分配 

分 类 号：S451[农业科学—植物保护]