二甲四氯与尿素混用对小麦光合速率及产量的影响

Effect of herbicides on yield and photosyntnesis rate of wheat

本试验采用了二因素随机区组设计,主要研究了除草剂二甲四氯(设5个水平)与氮肥(尿素,设5个水平)混施对冬小麦田小麦植株的光合速率和产量的影响,筛选出了安全、高效的除草剂与氮肥混施的方案。试验结果表明:二甲四氯与尿素在冬小麦返青、拔节期间合理混施,不仅可以促进小麦生长发育,改善小麦农艺性状,提高小麦产量,且对杂草有良好的防除效果(有文另发)。在保证小麦安全生长、提高产量和兼顾杂草防效的基础上,它们之间的优化配比量为:二甲四氯(1500-2250g/hm2)+尿素(337.5-450kg/hm2)。

This paper, by two factor randomized block design, studied experimental scheme with herbicide（2,4 - D butylate and MCPA, each set up 5 level ） and nitrogenous fertukuzer（carbamide, set up 5 level）. In this paper safety aspects on the winter wheat and herbicides performance of wheat field weeds were carried on. Morphological and physiological indicators of the winter wheat were determined and analyzed, such as crop height, spike long, leaf area, the content of chlorophyll, photosynthesis rate, level of nitrate reductase, level of SOD and so on. Furthermore, wheat yield and wheat field weed preventive and killing were investigated. Thereby, safe and high effect scheme with herbicide and fertilizer mixed using were sifted. The result indicated thm^2t, 2,4 -D butylate and carbamide, MCPA and carbamide were mixed using in wheat field between return green period and draw blur period. In general, under the safety aspects of wheat, improved yield and the effect of wheat field weed control, the optimization scheme was： MCPA （ 1500 - 2250g/hm^2） ＋ carbamide （337. 5 - 450kg/hm^2 ）.