渗灌次数对西北荒漠灌区紫花苜蓿栽培草地土壤化学性质的影响

发布时间：2018-07-12 08:25

本文选题：渗灌 + 苜蓿　；参考：《草地学报》2017年03期

【摘要】：渗灌是节水农业中最有效的措施之一,有利于作物产量和水分利用率的提高。本研究以甘肃省金昌市杨柳青公司紫花苜蓿‘艾迪娜’(M.sativa L.‘Aidina’)试验地渗灌区土壤为研究对象,通过田间试验与室内分析相结合的方法,研究不同渗灌次数(0次、1次、2次、3次)对苜蓿出苗期不同土层深度及管距位置土壤化学性质的影响。结果表明:在0~10cm和10~20cm土层深度,pH最高值均出现在管上,较CK升高了8.21%和8.68%,最低值都出现在管中,较CK降低了2.70%和3.37%;2水和3水均能显著提高不同土层深度及不同管距位置的pH值(P0.05)。不同渗灌次数,不同土层深度管中的水溶性盐含量均高于管上和管近,且最大值都出现在1水,较CK分别增加了83.26%和96.34%;不同土层深度,2水的水溶性盐含量平均值都低于1水和3水;不同渗灌次数,不同土层深度,钠离子和钾离子含量的最大值均出现在管中。不同渗灌次数,不同土层深度,管中的水解性氮含量均高于管上和管近,最大值都出现在1水管中,较CK分别增加了112.68%和34.48%。随着渗灌次数的增多,0~10cm土层深度不同管距的速效磷含量均呈现下降趋势,速效钾含量均呈现上升趋势。随着灌水次数的增加,不同土层深度及管位的有机质含量均呈现先上升后下降的趋势,2水显著提高了各位置土壤有机质含量(P0.05)。综上所述,渗灌2次比较好,土壤水溶性盐含量较低且有机质含量较高,利于苜蓿幼苗生长。
[Abstract]:Infiltration irrigation is one of the most effective measures in water-saving agriculture, which is beneficial to the improvement of crop yield and water use efficiency. In this study, the soil of alfalfa 'Aidina' (M. sativa L. Aidina') experimental plot of Jinchang City, Gansu Province, was used as the research object, and the method of combining field experiment with indoor analysis was used to study the soil of alfalfa 'Aidina'. The effects of different infiltration irrigation times (0 times, 1 time, 2 times, 3 times) on the soil chemical properties of alfalfa at different depth of soil layer and the position of tube distance were studied. The results showed that the highest pH value of soil depth and depth of 0~10cm and 10~20cm appeared on the tube, which was 8.21% and 8.68 higher than that of CK, and the lowest value appeared in the tube, which decreased 2.70% and 3.37% of water and 3 water significantly increased the pH value of different soil depth and different pipe distance (P0.05). The water soluble salt content in the pipe of different soil depth was higher than that on the tube and near the pipe, and the maximum value appeared in 1 water. Compared with CK, the water soluble salt content of water in different soil depth was lower than that of 1 water and 3 water, and the maximum of sodium ion and potassium ion appeared in the tube with different infiltration times, different soil depth and different soil depth, respectively, and the water soluble salt content of different soil depth was lower than that of CK, and the water soluble salt content of different soil depth was lower than that of 1 water and 3 water. The content of hydrolytic nitrogen in the pipe was higher than that on the tube and near the pipe with different infiltration times and different soil depth, and the maximum value appeared in the first pipe, which increased by 112.68% and 34.48% than CK, respectively. With the increase of infiltration irrigation times, the content of available phosphorus in different depth of 10cm soil layer decreased, and the content of available potassium increased. With the increase of irrigation times, the soil organic matter content in different soil depth and pipe position increased firstly and then decreased (P0.05). To sum up, the infiltration irrigation twice is better, the soil water soluble salt content is lower and the organic matter content is higher, which is beneficial to the growth of alfalfa seedlings.
【作者单位】：甘肃农业大学草业学院草业生态系统教育部重点实验室中-美草地畜牧业可持续发展研究中心;甘肃省杨柳青公司;
【基金】：西北荒漠灌区提高苜蓿出苗保苗技术研究(2014030488) 国家牧草产业体系(CARS-35) 苜蓿产业化新技术研究与集成示范推广项目资助
【分类号】：S153;S541.9

【相似文献】