| 摘要: |
| 为检测牧草对粤北南雄红壤地种植的耐受性, 以山毛豆 Tephrosia candida、 木豆 Cajanus cajan、 象草 Pennisetum purpureum、 菊苣 Cichorium intybus、 糖蜜草 Melinis minutiflora 和晚熟狼尾草 Pennisetum alopecuroides 6 种牧草为试验材料, 在广东南雄红壤地试验种植, 测定种植一年后土壤的容重、 孔隙
度、 pH、 有机质、 电导率等土壤指标, 分析比较不同牧草对土壤结构变化影响的差异性。 结果表明:
(1) 种植牧草后, 土壤的 pH 值得到不同程度提升, 其中菊苣使土壤 pH 值提升了 0. 54, 电导率较对照
组增加了 30. 1 μs/ cm; (2) 木豆对土壤容重影响最大, 降幅达 16. 3%, 而山毛豆和象草更有利于土壤
有机质富集; (3) 山毛豆、 木豆、 菊苣和晚熟狼尾草均有效提高了土壤总孔隙度, 并且使得非毛管孔
隙度占总孔隙度的比例由种植前的 25. 96%提升至 30. 17% ~ 43. 39%; (4) 6 种牧草与容重和总孔隙度
分别呈显著正相 |
| 关键词: 牧草 红壤 南雄 种植 |
| DOI： |
| 分类号: |
| 基金项目:广东省普通高校优稀特色经济林果工程技术研究中心 ( 2022GCZX002), 广东省土地复垦植被恢复工程技术研究中心 (粤科函政字 〔2013〕 1589 号); 广东省技术服务项目 (2022440111000724)。 |
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| Comparison of Soil Physicochemical Properties of 6 Forage Species in Nanxiong Red Soil of Guangdong Province |
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zoujingyuan1, liyongquan1, cuiyu2, zengxianhuang2, zhangbin2, gaozujian1, chenping1, zhousheng1, zhanghui1
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1.Zhongkai University of Agriculture and Engineering;2.Guangdong Yuexiong Forestry Investment Co. LTD
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| Abstract: |
| In order to assess the tolerance of forage in the red soil of Nanxiong, northern Guangdong, the
experiment used six forage: They are Tephrosia candida, Cajanus cajan, Pennisetum purpureum, Cichorium
intybus, Melinis minutiflora and Pennisetum alopecuroides which were experimented and planted in the red soil
of Nanxiong, Guangdong. By observing the growth of these forage plants in red soil and measuring soil properties such as bulk density, porosity, pH, organic matter and conductivity one year later, an analysis of variance
was conducted to compare the differential effects of different forages on soil quality. The results show that (1)
after planting the forage, the pH value of the soil was improved to varying degrees. Notably, C. intybus in- creased the soil pH value by 0. 54, resulting in an increase in conductivity by 30. 1 μs/ cm compared to the control group; ( 2) the maximum reduction in soil bulk density was achieved by C. cajan, with a decrease of
16. 3%, while T. candida and P. purpureum were more conducive to the enrichment of soil organic matter; (3)
T. candida, C. cajan, C. intybus and P. alopecuroides all effectively enhanced the total soil porosity and the
proportion of non-capillary porosity in total porosity from 25. 96% to 30. 17% -43. 39%; (4) forage varieties
showed a significant positive correlation with bulk density and a highly significant negative correlation with total
porosity, indicating that soil structure changes have an impact on forage and different forages have differential
effects on soil structure. |
| Key words: forage red soil Nanxiong plantation |
