摘要
针对甘肃白银地区盐碱地碱化度高、土壤结构差,盐分难以淋洗等瓶颈的问题,本研究采用沼液进行改良,沼液通过滴灌方式兑水稀释后滴入土壤。设置不同沼液施用量T0(0 t/hm2)、T1(1.2 t/hm2)、T2(1.3 t/hm2)、T3(1.4 t/hm2)、T4(1.5 t/hm2),通过田间对比试验,研究不同沼液施用量对盐碱地碱化度、p H的影响以及对油葵生长和产量的影响。试验结果表明:施用沼液后土壤肥力显著提高,能有效改善土壤理化性质,降低土壤p H、碱化度,0~20 cm土层脱盐效果显著,但在20 cm土层以下出现盐分累积现象;在T3处理下,油葵产量最高,达2 384.8 kg/hm2。试验结果表明施用适量的沼液能改善土壤理化性质利于油葵生长。
In view of the problems of high salinity, poor soil structure and difficult leaching of salt in the saline alkali soil of Baiyin City of Gansu Province. This study uses biogas slurry to change for the better, and the biogas slurry is dripped into the soil by drip irrigation. This study sets up the fivebiog as slurry application rates treatments, including 0 t/hm2（ T0）, 1.2 t/hm2（ T1 ）, 1.3 t/hm2（ T2）, 1.4 t/hm2（ T3）, 1.5 t/hm2（ T4）, and each treatment is repeated 3 times. Through field experiment to study the different effect of the amount of biogas slurry of saline alkalinity and pH as well as the influence on the growth and yield of oil sunflower. The results show that：the application of biogas slurry can significantly improve soil fertility, improve the soil physical and chemical properties, reduce soil pH, alkalinity, 0- 20 cm soil desalting effect is significant, but soil layer in 20 to 60 cm has the phenomenon of salinity accumulation. Under T3 treatment, the yield of oil sunflower is the highest （2 384. 8 kg/hm2）. The results show that applying proper biogas slurry can improve soil physical and chemical properties and be beneficial to oil sunflower growth.
作者
王旭
孙兆军
何俊
焦炳忠
WANG Xu1, SUN Zhao-jun1,2,3,4, HE Jun4, JIAO Bing-zhong1(1.School of Civil Engineering and Water Conservancy, Ningxia University, Yinchuan 750021, China; 2. School of Resources and Environmental Science, Ningxia University, Yinchuan 750021, China; 3. Ningxia（China-Arab） Key Laboratory of Resources Assessment and Environmental Regulation in Arid Regions, Yinchuan 750021, China; 4. Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China)
出处
《中国农村水利水电》
北大核心
2018年第3期55-58,61,共5页
China Rural Water and Hydropower
基金
国家林业公益性行业科研重大专项(201504402)
国家自然科学基金项目(31460220)
关键词
滴灌
沼液
PH
碱化度
油葵产量
drip irrigation
biogasslurry
pH
alkalinity
oil sunflower yield
