The abundance of broad-leaved weeds in peanut fields represents the handicap in weed management programs, since limited specific herbicides can be recommended to control them. Moreover, the physio-biochemical constituents and nutritional status in peanut plants as affected by available herbicides, i.e., bentazone under water stress conditions are not well known. Therefore, field trials were conducted during the growing seasons in 2016 and 2017 to investigate the interactional impact of irrigation levels (I50, I75 and I100, representing irrigation by 50%, 75% and 100% of crop evapotranspiration, respectively) and weed control practices (bentazone, bentazone+hoeing once, hoeing twice and weedy check as control) on dominant broad-leaved weeds as well as peanut physiological and agronomic traits. Result indicated that the efficiency of weed control for each weeded treatment under I50 significantly equaled with its counterpart under I75 or I100. Bentazone+hoeing once diminished weed biomass by 89.3% and enhanced chlorophyll content of peanut plants by 51.2%. Bentazone relatively caused a reduction in carotenoides. Hoeing twice and bentazone+hoeing once under I100 in both growing seasons as well as hoeing twice under I75 in 2017 were the superior combinations for boosting pod yield of peanut plants. Treatment of bentazone+hoeing once and I75 recorded the lowest reduction in N utilization percentage and the highest increase in potassium utilization percentage of peanut plants. Eliminating weeds enhanced water use efficiency by 37.8%, 49.6% and 34.7% under I50, I75 and I100, respectively. In conclusion, peanut seems to be tolerant to bentazone at moderate water supply, thus it can be safely used in controlling the associated broad-leaved weeds.

中文翻译：

---

苯达松除草剂对旱地阔叶杂草控制和水分管理作用下花生植株的生理生化和营养成分

花生田中大量阔叶杂草代表了杂草管理计划的障碍，因为可以推荐有限的特定除草剂来控制它们。此外，受可用除草剂影响的花生植株的生理生化成分和营养状况，即在水分胁迫条件下的灭草松还不是很清楚。因此，在 2016 年和 2017 年的生长季节进行了田间试验，以研究灌溉水平（I50、I75 和 I100，分别代表作物蒸发蒸腾量的 50%、75% 和 100%）和杂草控制措施的相互作用影响(苯他松、苯他松+锄一次、锄两次和杂草检查为对照)对优势阔叶杂草以及花生生理和农艺性状的影响。结果表明，I50下各杂草处理的杂草控制效率与I75或I100下的对应物显着相等。苯他松+锄草曾使杂草生物量减少 89.3%，花生植株叶绿素含量增加 51.2%。苯他酮相对引起类胡萝卜素的减少。两个生长季在I100下锄两次和灭草松+锄一次，以及2017年在I75下锄两次是提高花生植株荚果产量的优良组合。灭草松+锄一次和I75处理记录了花生植株的氮利用百分比降低最小和钾利用百分比增加最大。在 I50、I75 和 I100 下，除草使水分利用效率分别提高了 37.8%、49.6% 和 34.7%。综上所述，