淡水资源的匮乏增加了对微咸水等非常规水资源的利用,再生水,等。,尤其是在缺水地区。需要研究使用再生水和微咸水(RBCI)的灌溉周期是否会对作物产量造成次生土壤盐渍化的风险。为了找到适合不同非常规水资源的用途,盆栽试验研究了RBCI对土壤微环境的影响,增长,作物的生理特性和抗氧化特性。结果表明:(1)与FBCI相比,土壤水分含量稍高,没有显著差异,而土壤EC,钠和氯离子含量在RBCI处理下显着增加。随着再生水灌溉频率(Tri)的增加,EC的内容,土壤中Na+和Cl-逐渐降低,且差异显著;土壤水分含量也逐渐降低。(2)RBCI对土壤酶活性有不同的影响。随着Tri的增加,土壤脲酶活性总体呈显着上升趋势。(3)RBCI可以在一定程度上缓解土壤盐渍化风险。土壤pH值均低于8.5,没有二次土壤碱化的风险。ESP不超过15%,除了通过微咸水灌溉灌溉的土壤中的ESP超过15%的限制外,没有可能的土壤碱化风险。(4)与FBCI相比,RBCI处理下的地上和地下生物量均无明显变化。与纯微咸水灌溉相比,RBCI处理有利于增加地上生物量。因此,短期RBCI有助于降低土壤盐渍化风险,而不会显著影响作物产量,建议使用3g·L-1的再生-微咸水灌溉周期,根据实验结果。
The scarcity of freshwater resources has increased the use of nonconventional water resources such as brackish water, reclaimed water, etc., especially in water-scarce areas. Whether an irrigation cycle using reclaimed water and brackish water (RBCI) poses a risk of secondary soil salinization to crop yields needs to be studied. Aiming to find an appropriate use for different nonconventional water resources, pot experiments were conducted to study the effects of RBCI on soil microenvironments, growth, physiological characteristics and antioxidation properties of crops. The results showed the following: (1) compared to FBCI, the soil moisture content was slightly higher, without a significant difference, while the soil EC, sodium and chloride ions contents increased significantly under the RBCI treatment. With an increase in the reclaimed water irrigation frequency (Tri), the contents of EC, Na+ and Cl- in the soil decreased gradually, and the difference was significant; the soil moisture content also decreased gradually. (2) There were different effects of the RBCI regime on the soil\'s enzyme activities. With an increase in the Tri, the soil urease activity indicated a significant upward trend as a whole. (3) RBCI can alleviate the risk of soil salinization to some extent. The soil pH values were all below 8.5, and were without a risk of secondary soil alkalization. The ESP did not exceed 15 percent, and there was no possible risk of soil alkalization except that the ESP in soil irrigated by brackish water irrigation went beyond the limit of 15 percent. (4) Compared with FBCI, no obvious changes appeared to the aboveground and underground biomasses under the RBCI treatment. The RBCI treatment was conducive to increasing the aboveground biomass compared with pure brackish water irrigation. Therefore, short-term RBCI helps to reduce the risk of soil salinization without significantly affecting crop yield, and the irrigation cycle using reclaimed-reclaimed-brackish water at 3 g·L-1 was recommended, according to the experimental results.