Ling Qiang, Zhao Xi-ning, Gao Xiao-dong, Li Lu-sheng, Li Hong-chen, Sun Wen-hao
Ying Yong Sheng Tai Xue Bao. 2016 Feb;27(2):504-10.
Soil moisture variation in dryland sloping jujube. orchard was investigated after introducing two economic crops, i.e., feed Brassica napus (JR) and Hemerocallis fulva (JH) planted between jujube rows. Jujube tree without inter-row crop was set as control (CK). The results showed that mean soil moisture for JR and JH in the 0-180 cm soil layer increased by 6.2% and 10.1% compared with CK, respectively. Soil moisture changed mainly in the 0-60 cm soil layer in growth stage of Jujube trees. Soil moisture in JR and JH treatments significantly increased in the 0-60 cm soil layer, which could meet the demand in water resource of jujube plantation. The water consumption of jujube trees also mainly concentrated in the 0-60 cm soil layer. There was a significant decay exponential relationship between the soil moisture in the 0-20 cm layer and the drought duration after rainfall. During the 18-day dry period after rain, the soil moisture contents of JR and JH were apparently higher than that of CK. In conclusion, the jujube-crop intercropping system improved the soil moisture condition. It was an effective measure to overcome the seasonal drought in jujube orchards on the loess hilly region.
在旱地坡地枣园引入两种经济作物，即枣行间种植饲料油菜（JR）和萱草（JH）后，对土壤水分变化进行了调查。将未进行行间作物种植的枣树设为对照（CK）。结果表明，0-180厘米土层中JR和JH的平均土壤水分分别比CK增加了6.2%和10.1%。枣树生长阶段土壤水分变化主要发生在0-60厘米土层。JR和JH处理在0-60厘米土层的土壤水分显著增加，能够满足枣园的水资源需求。枣树的耗水也主要集中在0-60厘米土层。0-20厘米土层的土壤水分与降雨后的干旱持续时间之间存在显著的衰减指数关系。雨后18天干旱期内，JR和JH的土壤水分含量明显高于CK。综上所述，枣-作物间作系统改善了土壤水分状况。这是克服黄土丘陵区枣园季节性干旱的有效措施。
