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首页> 外文期刊>American-Eurasian Journal of Agricultural and Environmental Sciences >Hydrophobic-Hydrophilic Combination for Sandy Soil Conditioning and Plantation 1-Growth Response and Water and Fertilizers use Efficiency by Casuarina Trees
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Hydrophobic-Hydrophilic Combination for Sandy Soil Conditioning and Plantation 1-Growth Response and Water and Fertilizers use Efficiency by Casuarina Trees

机译：疏水-亲水组合用于沙质土壤调理和人工林的1-生长响应以及木麻黄树的水肥利用率

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At two successive years (2006 and 2007) split plant designed field experiment with four replications was conducted on a drip irrigated sandy soil at El-Katta, Giza Governorate, Egypt. One year old nursery plants of Casuarina were chosen as the indicator plants. Examined treatments were a) untreated soil b) soil treated with 150g/m~2 locally prepared bitumen emulsion 50% active material as the hydrophobic coditioner c) 20g acrylamide hydrogel as the hydrophilic one incorporated in the plant pit at a depth of 30 cm d) and e) 10g and 20g hydrogel incorporated in the plant pit before mulching the soil with 150 g bitumen emulsion/m~2 soil. The mulched area for each tree was 2m~2. Four irrigation treatments were examined i.e. 100 (I_1), 80 (I_2), 60 (I_3)and 40% (I_4) of the water requirements by the trees. Growth response for both roots and shoots and dry weight of the trees determined after 12 month from transplantation and water and fertilizers use efficiency by the trees were taken as parameters forevaluation. Incorporating the hydrogel in the plant pit followed by mulching the soil with the locally prepared bitumen emulsion is more effective than using each of them alone. The combined and interacted effects of applying both technologies for sandysoil conditioning together were practically proved. Better plant growth, higher water and fertilizers use efficiency by trees were gained, especially when using lower quantities of irrigation water. Incorporating 20g hydrogel in the plant pit before mulching ~ 2m~2 locally prepared bitumen emulsion at the rate of 150g/m~2 under I_3 irrigation treatment seems to be effective and more economic at the same time. Besides saving nearly 2/3 the quantities of water normally used for irrigation. Cost of the applied conditioners under such condition is about 0.8L.E./tree. Since the required wind break trees for one feddan (4200m~2) ranges between 30 and 60 trees, costs of soil conditioners needed to get the highest growth response and water and fertilizer useefficiency by the trees will not exceed 48 L.E./feddan.
机译：在连续两年（2006年和2007年）期间，在埃及吉萨省El-Katta的滴灌沙质土壤上进行了四次重复的分厂设计的田间试验。木麻黄一年生苗木被选为指示植物。检查的处理方法是：a）未经处理的土壤b）用150g / m〜2本地制备的沥青乳液处理的土壤50％的活性材料作为疏水性调节剂c）20g丙烯酰胺水凝胶作为亲水性材料掺入植物坑深30 cm d ）和e）在植物坑中掺入10g和20g水凝胶，然后以150 g沥青乳液/ m〜2土壤覆盖土壤。每棵树的覆盖面积为2m〜2。检查了四种灌溉处理方法，即树木需水量分别为100（I_1），80（I_2），60（I_3）和40％（I_4）。移植12个月后测定的树木的根，芽的生长响应和干重以及树木的水和肥料使用效率被用作评价的参数。将水凝胶掺入植物坑中，然后用当地制备的沥青乳液覆盖土壤比单独使用它们更有效。实践证明了将两种技术一起用于砂土调理的联合作用和相互作用。树木获得了更好的植物生长，更高的水和肥料利用率，尤其是在使用少量灌溉水时。在I_3灌溉处理下，以150g / m〜2的比例覆盖约2m〜2的本地制备的沥青乳液之前，在植物坑中掺入20g水凝胶似乎是有效的，同时更经济。除了节省将近2/3的水量通常用于灌溉。在这种条件下使用的护发素的成本约为0.8L.E./棵树。由于一棵联邦丹（4200m〜2）所需的防风林树木介于30到60棵之间，因此为了获得最高的生长响应以及树木的水肥利用率，所需的土壤改良剂成本不会超过48 L.E./联邦丹。

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