Soil water effects of agroforestry in rainfed jujube (Ziziphus jujube Mill.) orchards on loess hillslopes in Northwest China
Soil water effects of agroforestry in rainfed jujube (Ziziphus jujube Mill.) orchards on loess hillslopes in Northwest China
复制标题
西北黄土坡地雨养枣园农林复合土壤水分效应
DOI：
10.1016/j.agee.2017.06.031
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发表时间：
2017-09-01
影响因子：
6.6
通讯作者：
Wu, Pute
中科院分区：
文献类型：
--
作者：
Ling, Qiang;Gao, Xiaodong;Wu, Pute
土壤水分是影响黄土高原作物生长和生产力的最关键因素。该地区枣树园普遍推行的清洁耕作土壤管理措施，造成了严重的土壤侵蚀和土壤质量退化等环境问题。农林业是一个有前途的途径，以科普这一问题，但其对土壤水分在根区的影响还有待阐明。在黄土高原坡地枣园设置两种不同的农林复合系统，研究其对根区土壤水分的影响。枣行间种植黄花菜和饲用油菜。结果表明，与对照相比，两种农林复合系统均明显提高了枣林下0-20 cm和20-60 cm土层土壤水分，但不同年份枣林下60-120 cm和120-180 cm土层土壤水分明显降低。提出了一种利用行间作物与枣树间土壤水分差异来判断水分竞争发生可能性的简便方法。结果表明，在枣中，H.番茄间作系统，H.在相对干旱期（5 ~ 7月），灰霉病菌与枣树在0-120 cm土层内频繁竞争土壤水分。然而，几乎没有水竞争发生在Bambe-B。napes治疗总的来说，饲料B。油菜比黄花菜更适合与枣树间作。研究结果可为水资源有限地区坡地果园的地面管理实践提供参考。
Soil water is the most critical factor influencing the growth and productivity of crops on the Loess Plateau of China. The popular clean-cultivation soil management practice in rainfed jujube orchards in this region causes a variety of environmental problems, including serious soil erosion and soil quality degradation. Agroforestry is a promising avenue to cope with this problem but its effect on soil water in the root zone is yet to be elucidated. In this study, two different agroforestry systems were established in jujube orchards on the hillslopes of the Loess Plateau, to test the effects on root-zone soil water. The Hemerocallis fulva and fodder Brassica napes were planted between jujube rows. The results showed that both agroforestry systems clearly improved soil water at depths of 0-20 cm and 20-60 cm under jujube trees, however, they apparently reduced the inter-row soil water at depths of 60-120 cm and 120-180 cm in different years compared to the control. A simple method, based on the difference of soil water content between inter-row crops and jujube trees (SWDR), was introduced to judge the possibility of water competition happening. The analyses based on this method showed that in the jujube- H. fulva intercropping system, H. fulva frequently competed soil water with jujube trees in the 0-120 cm depth primarily in the relatively dry period (May to July). However, there was almost no water competition occurred in the jujube-B. napes treatment. Overall, fodder B. napes may be more appropriate than Hemerocailis fulva for intercropping with jujube trees. The results here can provide insights into ground management practice of sloping orchards in water-limited areas.