滴灌条件下不同保水剂在枣林坡地的应用效果研究

Study on effect of using different water absorbents on jujube in slope land under the condition of drip irrigation

利用野外试验方法,在滴灌条件下研究了保水剂在坡地枣林中的使用效果。试验结果证明：施用保水剂的土壤含水量较对照提高了15.3%-39.2%,使10-70 cm土层有较高贮存水量,在年生育期平均降雨量为395 mm情况下,确定红枣整个生育期（为210 d）共灌水4次,按大约每55 d灌溉一次计算,可减少灌溉2次,节约用水264 m^3/hm^2;0-60 cm土壤平均容重降低0.05-0.16 g/cm^3,改善了土壤的通气透水的土壤物理性质,促进了枣树的生长发育,与对照株产5.6 kg相比,四年生红枣单株最高可增产2.85 kg/株;就不同保水剂综合来说,Hs和Hm表现出良好的适宜性。

Through the field experiment for the purpose of studying the effect of using water absorbent on jujube in slope under the condition of drip irrigation.The results showed that the soil water of under water absorbent treatments raised by 15.3%～39.2% compared to the control,keeping higher water storage in 10～70 cm soil layer.In cases of the many years of the 395 mm rainfall during growth period, 4 times of irrigation is needed for Jujube trees in the whole growth period（210 d）,with an interval of about 55 days. However, with the treatments of water absorbent, two times of irrigation can be reduced, saving 264 m^3 water per hectare, and the average bulk density of soil is reduced by 0.05 -0.16 g/cm^3 in 0 - 60 cm, thus improving soil physical properties of air and water permeability and promoting the growth and development of jujube trees. Compared to 5.6 kg per tree of the control, the yield of a four-year-old jujube tree is increased by 2.85 kg. Among different water absorbents, Hs and Hm show better suitability.