| 李榕,马哲,丁宇儒,杨馥键,刘国正,马健琦.黑土@PAM保水剂对青藏高原“黑土滩”青稞生长和草原固沙性能的影响[J].干旱地区农业研究,2025,(5):272~279 |
| 黑土@PAM保水剂对青藏高原“黑土滩”青稞生长和草原固沙性能的影响 |
| Effects of black soil\|@PAM water\|retaining agent on the growth of highland barley and sand\|fixing performance of grassland in “Black Soil Beach” of the Qinghai\|Tibet Plateau |
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| DOI：10.7606/j.issn.1000-7601.2025.05.27 |
| 中文关键词: 保水剂 合成工艺 固沙性能 青稞 青藏高原 |
| 英文关键词:water\|retaining agent synthetic process sand\|fixing performance highland barley Qinghai\|Tibet Plateau |
| 基金项目:甘肃省青年科技基金（25JRRP001）；甘肃省高等教育教学改革研究重点项目(GJJGA134)；甘肃省高等学校创新基金（2021B-302）；2024年甘肃民族师范学院校长科研基金（2024XZCX-19）；2024年甘肃民族师范学院教学成果培育项目（NO.17） |
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| 中文摘要: |
| 为探寻适合青藏高原旱地青稞生长的适宜保水剂，并能有效治理其东部边缘“黑土滩”草原退化的现象，采用“黑土滩”的黑土（BC）、丙烯酰胺（AM）、N,N′-亚甲基双丙烯酰胺（MBA）和过硫酸铵（APS）为原料，制备出吸水率414.3%、保水率383.8%的黑土@PAM保水剂,并设计三因素三水平正交试验选择黑土@PAM保水剂最佳优化组合；运用FT-IR和SEM对其微观结构进行表征和机理分析，同时研究了黑土@PAM保水剂的反复吸水性能、抗盐性、pH响应性、固沙性能及其在干旱胁迫下对青稞多酚氧化酶（PPO）活性和土壤持水性能的影响。结果表明，黑土@PAM保水剂在经过6次反复吸水后，吸水率依然达338.5%，适用于pH值为6.0~9.0的土壤环境；添加保水剂35 d后土壤湿度从40.3%降至34.1%，PPO活性从2.23 mg·g-1升高至2.31 mg·g-1，叶片出现褐变情况较少；在种植了梭罗草的土壤中施加黑土@PAM,土壤风蚀模数显著降低，说明其具有较好的固沙性能。 |
| 英文摘要: |
| In order to find suitable water\|retaining agents for the growth of highland barley or the Qinghai\|Tibet Plateau and effectively control the degradation of the “black soil beach” grassland on its eastern margin, a black soil\|based polyacrylamide water\|retaining agent (BC@PAM) was prepared using black soil (BC), acrylamide (AM), N,N′\|methylene bisacrylamide (MBA), and ammonium persulfate (APS). The BC@PAM had the water absorption rate of 414.3% and the water retention rate of 383.8%. A three\|factor and three\|level orthogonal test was designed to select the best synthesis conditions of BC@PAM. The microstructure of BC@PAM was characterized by FT-IR and SEM. The repeated water absorption performance, salt resistance, pH responsiveness, and sand\|fixing performance of BC@PAM were evaluated. The effects of BC@PAM on the activity of PPO of highland barley and soil water retention under drought stress were analyzed. The results showed that the water retention rate of BC@PAM was as high as 338.5% after 6 times of repeated water absorption, and it was suitable for soil with the pH value of 6.0~9.0. The moisture of the soil with BC@PAM decreased from 40.3% to 34.1% after 35 days, the PPO activity in barley increased from 2.23 mg·g-1 to 2.31 mg·g-1, and leaf browning was less frequent. After the application of BC@PAM, the wind erosion modulus of the soil planted with thoreau was significantly reduced, and it indicated that the soil had better sand\|fixing performance. |
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