本文選題：滲灌 + 苜蓿��； 參考：《草地學(xué)報(bào)》2017年03期

【摘要】：滲灌是節(jié)水農(nóng)業(yè)中最有效的措施之一,有利于作物產(chǎn)量和水分利用率的提高。本研究以甘肅省金昌市楊柳青公司紫花苜�！夏取�(M.sativa L.‘Aidina’)試驗(yàn)地滲灌區(qū)土壤為研究對(duì)象,通過(guò)田間試驗(yàn)與室內(nèi)分析相結(jié)合的方法,研究不同滲灌次數(shù)(0次、1次、2次、3次)對(duì)苜蓿出苗期不同土層深度及管距位置土壤化學(xué)性質(zhì)的影響。結(jié)果表明:在0~10cm和10~20cm土層深度,pH最高值均出現(xiàn)在管上,較CK升高了8.21%和8.68%,最低值都出現(xiàn)在管中,較CK降低了2.70%和3.37%;2水和3水均能顯著提高不同土層深度及不同管距位置的pH值(P0.05)。不同滲灌次數(shù),不同土層深度管中的水溶性鹽含量均高于管上和管近,且最大值都出現(xiàn)在1水,較CK分別增加了83.26%和96.34%;不同土層深度,2水的水溶性鹽含量平均值都低于1水和3水;不同滲灌次數(shù),不同土層深度,鈉離子和鉀離子含量的最大值均出現(xiàn)在管中。不同滲灌次數(shù),不同土層深度,管中的水解性氮含量均高于管上和管近,最大值都出現(xiàn)在1水管中,較CK分別增加了112.68%和34.48%。隨著滲灌次數(shù)的增多,0~10cm土層深度不同管距的速效磷含量均呈現(xiàn)下降趨勢(shì),速效鉀含量均呈現(xiàn)上升趨勢(shì)。隨著灌水次數(shù)的增加,不同土層深度及管位的有機(jī)質(zhì)含量均呈現(xiàn)先上升后下降的趨勢(shì),2水顯著提高了各位置土壤有機(jī)質(zhì)含量(P0.05)。綜上所述,滲灌2次比較好,土壤水溶性鹽含量較低且有機(jī)質(zhì)含量較高,利于苜蓿幼苗生長(zhǎng)。
[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.
【作者單位】： 甘肅農(nóng)業(yè)大學(xué)草業(yè)學(xué)院草業(yè)生態(tài)系統(tǒng)教育部重點(diǎn)實(shí)驗(yàn)室中-美草地畜牧業(yè)可持續(xù)發(fā)展研究中心;甘肅省楊柳青公司;
【基金】：西北荒漠灌區(qū)提高苜蓿出苗保苗技術(shù)研究(2014030488) 國(guó)家牧草產(chǎn)業(yè)體系(CARS-35) 苜蓿產(chǎn)業(yè)化新技術(shù)研究與集成示范推廣項(xiàng)目資助
【分類(lèi)號(hào)】：S153;S541.9

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