| 河套灌区枸杞种植下微咸水代表性盐离子浓度限值研究 |
| |
| 引用本文： | 娄帅,杨树青,张万锋,刘月,吕欣河.河套灌区枸杞种植下微咸水代表性盐离子浓度限值研究[J].农业机械学报,2023,54(11):319-334. |
| |
| 作者姓名： | 娄帅 杨树青 张万锋 刘月 吕欣河 |
| |
| 作者单位： | 内蒙古农业大学;内蒙古师范大学 |
| |
| 基金项目： | 国家自然科学基金项目（52069023、52179037） |
| |
| 摘 要： | 为确定适宜枸杞灌溉的微咸水代表性盐离子浓度限值，于2019—2020年在河套灌区下游开展NaCl、CaCl2、CaSO4、NaHCO3、Na2SO4 5种代表性地下水盐分类型和4种浓度水平(质量浓度0.1、0.5、2.0、4.0 g/L)的田间交叉试验。结果表明：在相同矿化度下，外源NaCl、NaHCO3影响下枸杞生育期受渗透胁迫、次生胁迫最强，外源CaCl2质量浓度低于2.0 g/L能够缓解枸杞渗透胁迫，外源CaCl2、CaSO4质量浓度低于4.0 g/L能够缓解次生胁迫。枸杞干果产量、百粒干质量随外源NaCl、Na2SO4、CaSO4质量浓度升高而降低，在0.1 g/L时达峰值，随外源CaCl2质量浓度升高呈单峰分布，0.5 g/L时最高。枸杞果实中总糖含量、黄酮含量、氨基酸总量随外源CaCl
|
| 关 键 词： | 枸杞 微咸水 TOPSIS 盐胁迫 产量 品质 |
| 收稿时间： | 2023/1/11 0:00:00 |
Salt Concentration Threshold of Lycium barbarum under Different Types of Brackish Water Irrigation in Hetao Irrigation Area |
| |
| Institution: | Inner Mongolia Agricultural University;Inner Mongolia Normal University |
| |
| Abstract: | Lycium barbarum (goji) fruit is widely used as a medicinal food in China. Aiming to investigate how different types of salt ions in brackish water affected the yield, appearance quality, and nutritional quality of Lycium barbarum. A field crossover experiment was conducted in the Hetao Irrigation Area, using five representative groundwater salinity types (NaCl, CaCl2, CaSO4, NaHCO3, Na2SO4) at four concentration levels (0.1g/L, 0.5g/L, 2.0g/L, 4.0g/L), along with a total of 21 control treatments. The irrigation amount was 100mm of brackish water in Wulat Front Banner, the main production area of Lycium barbarum. Throughout the growth period, Lycium barbarum was irrigated three times. The results revealed that NaCl had the strongest inhibitory effect on the osmotic regulation of Lycium barbarum among the tested salinity types. NaHCO3 had the most significant impact on the secondary stress. CaCl2 at concentrations below 2.0g/L helped alleviate osmotic stress, while both CaCl2 and CaSO4 reduced secondary stress. The yield and dry mass of 100 grains of Lycium barbarum was decreased with the increase of concentrations of NaCl, Na2SO4, and CaSO4, reaching their peak at 0.1g/L.The yield and dry mass of 100 grains was initially increased and then decreased with the increase of concentrations of NaHCO3 and CaCl2, reaching their peak at 0.5g/L. Total sugars, flavonoids, and total amino acids were increased and then decreased with the increase of concentrations of CaCl2 and CaSO4, reaching their peak at 0.5g/L, 2.0g/L, and 2.0g/L, respectively. Betaine and total amino acids were decreased with the increase of concentrations of NaCl, Na2SO4, and NaHCO3, and significantly decreased after exceeding 0.1g/L. Carotenoid content was increased and then decreased with the increase of concentrations of CaCl2 and NaHCO3, reaching its peak at 2.0g/L and 0.5g/L, respectively, which was significantly higher than that of the control treatment. The comprehensive scores indicated that under the same anion (Cl-, SO2-4) environment, Na+ inhibited the planting benefits of Lycium barbarum, while Ca2+ promoted them. Under the same cation (Na+) environment, the inhibitory strength of different anions on the planting benefits of Lycium barbarum was observed in the order of Cl-,SO2-4,HCO-3. Based on Gaussian regression, it was found that when Na+, Ca2+, Cl-, SO2-4 and HCO-3 were ranged from 18.6mmol/L to 19.2mmol/L, 12.2mmol/L to 13.0mmol/L, 63.0mmol/L to 68.4mmol/L,6.3mmol/L to 14.4mmol/L and 5.5mmol/L to 14.0mmol/L, respectively, the planting benefit compatibility of Lycium barbarum was higher (Ci>0.7). With the improvement of Ci standard, Na+, Cl-, SO2-4, HCO-3 approached the lower limit (18.6mmol/L, 63.0mmol/L, 6.3mmol/L, 5.5mmol/L), and Ca2+ approached the upper limit (13.0mmol/L). The planting benefits remained satisfactory (with an average fit degree greater than 0.46) within the simulated range. The upper concentration thresholds were determined as 34.8mmol/L for Na+, 81.6mmol/L for Cl-, 22.6mmol/L for SO2-4, and 21.4mmol/L for HCO-3. The lower concentration threshold for Ca2+ was determined as 9.8mmol/L. These research findings provided a scientific basis for guiding the cultivation of Lycium barbarum in different water-quality areas of the Hetao Irrigation Area. The research evaluated the effects of different salinity levels of brackish water salt ions on the irrigation of Lycium barbarum and proposed suitable concentration ranges of various sensitive ions for irrigating Lycium barbarum, providing a theoretical basis for the promotion of brackish water irrigation for Lycium barbarum. The main innovation lied in the establishment of the relationship between brackish water salt ion concentration and the comprehensive benefits of Lycium barbarum through cross experiments and numerical simulations. The research findings demonstrated strong applicability in moderately saline-alkaline soils, mainly including loess and loam soils. |
| |
| Keywords: | Lycium barbarum brackish water TOPSIS salt stress yield quality |
|
| 点击此处可从《农业机械学报》浏览原始摘要信息 |
| 点击此处可从《农业机械学报》下载免费的PDF全文 |
|
