| 胶东梨园根系层土壤贮水量估算研究 |
| |
| 引用本文： | 刘继龙,张振华,谢恒星,蔡焕杰.胶东梨园根系层土壤贮水量估算研究[J].土壤通报,2007,38(4):640-644. |
| |
| 作者姓名： | 刘继龙 张振华 谢恒星 蔡焕杰 |
| |
| 作者单位： | 1. 鲁东大学,地理与资源管理学院,山东,烟台,264025
2. 西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100 |
| |
| 基金项目： | 国家自然科学基金;鲁东大学校科研和教改项目;鲁东大学校科研和教改项目 |
| |
| 摘 要： | 2005年4月～2006年1月期间利用Trime土壤水分速测系统,分18次测定了烟台农科院梨园0～180cm范围内的土壤水分。对表层土壤水分与深层土壤水分之间的转换关系,及梨树在不同生长阶段对转换关系的影响进行了研究。结果表明,在梨树生长旺盛期和休眠期两个阶段内,0～10cm和0～30cm土层对深层土壤水分的预测效果都较差,0～50cm对深层土壤水分的预测效果较好,预测结果中相对误差大于12%的分别占26.67%和20.00%,最大相对误差依次为21.07%和15.05%;经验模型的预测精度偏高且各模型在生长旺盛期内的预测效果总体上较在生长休眠期内的预测效果差。因而本地区进行深层土壤水分估算的最佳表层深度为0～50cm土层,且以经验模型预测为佳。
|
| 关 键 词： | 蒸腾 果园 表层土壤水分 深层土壤水分 转换函数 |
| 文章编号： | 0564-3945(2007)04-0640-05 |
| 修稿时间： | 2006年5月28日 |
Water Holding Capacity in Soil of Root Layer of Pear Orchard in Jiaodong Region |
| |
| LIU Ji-long,ZHANG Zhen-hua,XIE Heng-xing,CAI Huan-jie.Water Holding Capacity in Soil of Root Layer of Pear Orchard in Jiaodong Region[J].Chinese Journal of Soil Science,2007,38(4):640-644. |
| |
| Authors: | LIU Ji-long ZHANG Zhen-hua XIE Heng-xing CAI Huan-jie |
| |
| Abstract: | The soil water content within 0-180cm depth in a pear orchard was determined with Trime system for 18 times from April 2005 to January 2006.The conversion relations of the water content between surface and deeper layers and the effect of fruit tree's growth on the conversion relations were investigated.The results showed that at blooming and withering stages the forecast of water content in deeper layer by the water content of 0-10cm and 0-30cm soil depth was worse,while the forecast by the water content of 0-50cm soil was better.The relative error of more than 12% was accounted for 26.67 and 20.00%,respectively,and the maximal relative errors were 21.07% and 15.05% accordingly.The precision of empirical relation model was the best and as a whole,the forecasting reliability of all kinds of models was worse at the blooming relative to withering stages.Therefore,the optimal soil surface depth for forecasting the soil water content in deeper layer was 0-50cm in the region and forecasting reliability of empirical relation model was the best. |
| |
| Keywords: | Transpiration Orchard Surface soil water Deep soil water Conversion function |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
