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首页> 外文期刊>Agricultural Water Management >Maintaining a constant soil moisture level can enhance the growth and phenolic content of sweet basil better than fluctuating irrigation
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Maintaining a constant soil moisture level can enhance the growth and phenolic content of sweet basil better than fluctuating irrigation

机译：保持恒定的土壤水分水平可以提高甜罗勒的生长和酚醛含量，而不是波动灌溉

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Although soil moisture sensor-based automated irrigation systems enable researchers to grow plants efficiently and quantify drought stress via constant control of volumetric water content (VWC), growers, in practice, typically irrigate plants using excessive amounts of water based on their own experience. Herein, we investigated the effects of four different irrigation strategies on the growth, physiological responses, and phenolic content of sweet basil (Ocimum basilicum). Three-week-old seedlings were grown using an automated irrigation system incorporating a soil moisture sensor and datalogger. Treatments comprised two irrigation strategies: (i) maintaining a constant VWC of 0.30, 0.45, or 0.60 m(3).m(-3) by applying small amounts of tap water over time; and (ii) providing a fluctuating VWC (0.30 F), in which a large amount of tap water was applied when the VWC decreased to below 0.30 m(3).m(-3). Growth parameters were measured at 0, 5, 10, and 15 days after reaching a set point (DAS), and the total irrigation amount was measured at the end of the experiment. Shoot growth differed significantly among treatments, with the highest values being recorded under the 0.60 treatment, followed by the 0.45, 0.30 F, and 0.30 treatments. Physiological responses decreased under the 0.30 treatment but recovered with increasing DAS. Higher constant VWC treatments (0.45 and 0.60) were conducive to higher phenolic content, with the lowest content obtained under the 0.30 F treatment. Although we detected no significant difference in average VWCs between the 0.45 and 0.30 F treatments, 0.30 F treatment showed lower growth, physiological responses, and phenolic content. Collectively, our findings indicate that basil plants with a higher yield and phenolic content can be obtained by maintaining a constantly high VWC (0.60 m(3).m(-3)) than when they are provided with a lower or fluctuating VWC.
机译：虽然土壤湿度传感器的自动灌溉系统使研究人员能够通过持续控制体积水含量（VWC），种植者，在实践中，通常灌溉植物，通常使用基于自己的经验的过量水灌溉植物来高效地增长植物。在此，我们研究了四种不同灌溉策略对甜罗勒（OCimum Basilicum）的生长，生理反应和酚醛含量的影响。使用含有土壤湿度传感器和数据记录器的自动灌溉系统生长为期三周的幼苗。治疗包括两种灌溉策略：（i）通过在时间上施加少量抽水量，维持0.30,0.45或0.60米（3）.m（3）.m（3）.M（-3）的恒定VWC; （ii）提供波动的VWC（0.30f），其中当VWC降至0.30μm（3）℃时，施加大量自来水。在到达设定点（DAS）后在0,5,10和15天测量生长参数，并在实验结束时测量总灌溉量。射击生长在治疗中有显着差异，最高值在0.60处理下记录，其次是0.45,0.30f和0.30处理。在0.30处理下的生理反应减少，但随着DAS的增加回收。较高的恒定VWC处理（0.45和0.60）有利于较高的酚含量，在0.30f处理下获得的最低含量。虽然我们检测到0.45和0.30f治疗之间的平均VWC的平均VWC没有显着差异，但0.30°F处理显示出较低的生长，生理反应和酚醛含量。统称，我们的研究结果表明，通过维持恒定的高VWC（0.60μm（3），3）），可以获得具有更高产率和酚醛含量的罗勒植物而不是提供较低或波动的VWC。

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