| 尹笑笑，王 东.两种土壤质地麦田贮水量与表层土壤水分的关系[J].麦类作物学报,2018,(7):841 |
| 两种土壤质地麦田贮水量与表层土壤水分的关系 |
| Relation of the Soil Water Storage in a Certain Soil Depth to the Soil Water Content in the Surface Layer in Two Different Soil Texture Wheat Fields |
| |
| DOI：10.7606/j.issn.1009-1041.2018.07.12 |
| 中文关键词: 冬小麦 土壤质地 土壤含水量 土壤贮水量 数量关系 |
| 英文关键词:Winter wheat Soil texture Soil water content Soil water storage Quantitative relation |
| 基金项目:国家公益性行业(农业)科研专项(201503130) |
|
| 摘要点击次数: 990 |
| 全文下载次数: 553 |
| 中文摘要: |
| 为探明不同土壤质地麦田一定深度土层土壤贮水量与表层土壤含水量的数量关系，2013-2016年度分别于粉壤土和砂壤土地块，在冬小麦生育期间通过设置不同的补灌时期和拟湿润层深度实施补充灌溉，创造不同生育时期0~200 cm土层土壤贮水量及其纵向分布的差异，分析一定深度土层土壤贮水量与表层土壤含水量的关系，建立相关方程，并对关系方程的预测精确度进行检验。结果表明，冬前期、拔节期和开花期补灌前或补灌后，粉壤土地块0~20和0~40 cm土层土壤含水量与0~100和0~200 cm土层土壤贮水量均呈极显著正相关；砂壤土地块0~20和0~40 cm土层土壤含水量与0~100 cm土层土壤贮水量呈极显著正相关，与0~200 cm土层土壤贮水量无显著线性相关关系。在粉壤土地块利用0~20和0~40 cm土层土壤含水量预测0~100和0~200 cm土层土壤贮水量，模拟效果均较好。在砂壤土地块，利用0~20和0~40 cm土层土壤含水量预测0~100 cm土层土壤贮水量，模拟效果一般或差，较难以准确预测0~200 cm土层土壤贮水量。冬小麦生长季内灌水对0~20和0~40 cm土层土壤含水量与0~100和0~200 cm土层土壤贮水量的相关性没有显著影响，但改变了数量关系方程和决定系数的大小。土壤质地对表层土壤含水量与一定深度土层土壤贮水量的相关关系影响较大，在土壤墒情预测中应区别对待。 |
| 英文摘要: |
| The objective of the experiment is to explore the quantitative relation between soil water storage in a certain soil depth and soil water content in the surface layer in different soil texture wheat fields. The experiment was carried out from 2013 to 2016, in the powder loam and sandy loam field, with setting up the supplemental irrigation(SI) period and the depth of plan wetting soil layer to make the differences of soil water storage and its vertical distribution in the 0-200 cm soil layer during the growing season of winter wheat. The relationship between soil water storage in a certain soil depth and soil water content in the surface layer was analyzed to establish the relation equation. The prediction accuracy of these relation equations were also examined. The results showed that before or after SI at pre-winter, jointing and anthesis, there was significant and positive correlation between the soil water content in the 0-20 and 0-40 cm soil layers and the soil water storage in the 0-100 and 0- 200 cm soil layers in the powder loam plots. There was also significant and positive correlation between the soil water content in the 0-20 and 0-40 cm soil layers and the soil water storage in the 0-100 cm soil layer. But no significant linear correlation was obtained between the soil water content in the 0-20 and 0-40 cm soil layers and the soil water storage in the 0-200 cm soil layer in the sandy loam plots. In the powder loam plots, the accuracy of the simulated results of the soil water storage in the 0-100 and 0-200 cm soil layers predicted by the soil water content in the 0-20 and 0-40 cm soil layers was better. In the sandy loam plots, the accuracy of the simulated results of the soil water storage in the 0-100 cm soil layer predicted by the soil water content in the 0-20 and 0-40 cm soil layers was ordinary or poor. It is more difficult to accurately predict the soil water storage in the 0-200 cm layer. In summary, SI during the growing season of winter wheat has no significant influence on the correlation between the soil water content in the 0-20 and 0-40 cm soil layers and the soil water storage in the 0-100 and 0-200 cm soil layers. However, it changed their relation equations and coefficients of determination. Soil texture has a great influence on the correlation between the soil water storage in a certain soil depth and the soil water content in the surface layer. It should be treated differently in the prediction of soil moisture. |
|
查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
基本信息
