| 引用本文: | 王钰婷,田广丽,李东伟,等.生物质炭添加量对盐碱土壤特性及棉花苗期生长的影响[J].灌溉排水学报,0,():-. |
| WANG Yuting,TIAN Guangli,LI Dongwei,et al.生物质炭添加量对盐碱土壤特性及棉花苗期生长的影响[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】研究不同生物质炭添加量对盐碱土壤特性及棉花苗期生长的影响，为生物质炭在盐碱地上的应用提供科学的理论依据。【方法】本研究通过桶栽试验，以棉花（中S9612）为研究对象，设置添加生物质炭量0%（BC0）、1%（BC1）、3%(BC3)和5%(BC5)4个处理，分析了生物质炭对盐碱土壤水盐运移、土壤基本理化指标、土壤酶活性和棉花苗期生长指标的影响。【结果】与BC0相比，生物质炭可以提高0~20 cm土层质量含水率，质量含水率的增加量与生物质炭添加量成反比，但对20~30 cm土层质量含水率无显著影响；生物质炭能够降低0~-20 cm土层土壤含盐量；生物质炭对土壤pH、全磷（TP）和速效磷无显著影响；对土壤有机碳（SOC）、全氮（TN）、全钾（TK）、速效钾、过氧化物酶（POD）和纤维二糖苷酶（FTG）有显著正影响，且BC1处理的POD和FTG活性增加最显著；但对土壤碱解氮和多酚氧化酶（PPO）存在显著负影响；BC1处理显著增加苗期棉花的茎粗和地上部干物质量，对株高无显著影响，BC3处理对棉花株高、茎粗和地上部干物质量都无显著影响，BC5处理显著降低了苗期棉花的株高、茎粗和地上部干物质量；且添加生物质炭引起棉花茎叶全氮量减少。【结论】生物质炭可以增加土壤养分，提高土壤部分酶活性，但只有1%生物质炭添加量对棉花苗期生长具有促进作用，5%生物质炭添加量反而会抑制作物生长。 |
| 关键词: 盐碱土壤；生物质炭；土壤基本理化特性；土壤酶活性；作物生长 |
| DOI： |
| 分类号:S562 |
| 基金项目:中国农业科学院科技创新工程(编号CAAS-ZDRW202201) |
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| Effect of biochar amendment on soil characteristics and cotton seedling growth in saline soil |
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WANG Yuting, TIAN Guangli, LI Dongwei, TIAN Yuyu, ZHAO Qingqing, ZHOU Xinguo
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Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences
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| Abstract: |
| 【Objective】Aim at the application of biochar in saline soil, the response of characteristics of saline soil and the growth of cotton seedlings to different biochar additions was explored.【Method】In order to analyze the effects of biochar on the soil water-salt transport, soil physicochemical properties, soil enzyme activities, and growth indicators of cotton at the seedling stage, cotton (Medium S9612) was selected as the research object through the barrel, and four treatments were set with 0%(BC0) 1%(BC1) 3%(BC3) and 5%(BC5) of biochar content.【Result】The results showed that biochar improved the mass moisture content of the 0-20 cm soil layer whose increase was negatively correlated with biochar addition amount, but had no significant effect on the mass moisture content of the 20-30 cm soil layer. Biochar reduced soil salt content of the 0-20 cm soil layer. Biochar had no significant effects on soil pH, total phosphorus(TP), and available phosphorus. It enhanced soil organic carbon(SOC), total nitrogen(TN), total potassium(TK), available potassium, peroxidase(POD), and fibro two glycosidases(FTG), with the most significant increase in POD and FTG activities in the BC1 treatment. However, there were remarkable negative effects on soil alkali-hydrolyzable nitrogen and polyphenol oxidase(PPO). Under BC1 treatment, cotton stem diameter and above-ground dry matter accumulation increased significantly at the seedling stage, but plant height did not change obviously. The BC3 treatment had no significant effects on plant height, stem thickness, and above-ground dry matter mass of cotton. And the plant height, stem diameter, and above-ground dry matter accumulation of cotton at the seedling stage decreased significantly under BC5 treatment. Also, the addition of biochar caused a reduction in the total nitrogen content of cotton stems and leaves.【Conclusion】Biochar can increase soil nutrients and improve some soil enzyme activities, , but only 1% biochar addition amount has a beneficial effect on cotton seedling growth and 5% biochar addition amount inhibits crop growth. |
| Key words: saline soil; biochar; soil physicochemical properties; soil enzyme activities; crop growth |
