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首页> 外文期刊>Acta Horticulturae >Soil moisture profiles under different conditions associated with irrigation efficiency of drip irrigation - case studies from avocado and Mandarin, Limari River Valley.
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Soil moisture profiles under different conditions associated with irrigation efficiency of drip irrigation - case studies from avocado and Mandarin, Limari River Valley.

机译：与滴灌灌溉效率相关的不同条件下的土壤水分剖面-鳄梨和利马里河谷普通话的案例研究。

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Six tests were done to evaluate the application of irrigation rates in Limari River Valley (30 degrees 36' South Latitude 71 degrees 12' West Longitude and 218 m of altitude) in avocado and mandarin tree orchards during two agricultural seasons. Assessments were made in volumes of water applied, discharge of the drippers and irrigation frequency used. Also, the water stored in the soil profile was monitored by moisture direct sampling with drill, performed deeply and transversely to the drip lines and plantation rows. In the cases studied it was possible to appreciate a wide variety of situations regarding water stored in the profile. In the vast majority of cases, excess water conditions were found, both in the root zone and below it. In very few cases, the moisture in the root zone of trees reached levels close to permanent wilting percentage (PWP). This would reflect poor efficiency in the implementation and management of irrigation water through drip irrigation, regardless of the uniformity coefficient (UC) of drippers. This situation becomes much more problematic in those soils which present high percentages of clay; creating low aeration conditions for root development. It is also possible to observe an important deviation from moisture profiles to the lower or steeper sectors of the plantation system; generating drier soil or less humid conditions in higher zones, with a big impact on root development. When calculating the relation between the water stored in the root zone versus the total water available in the profile, results between 44 and 73% were obtained, values that reflect inefficient irrigation conditions. These results were corroborated by the high variation coefficients (VC) in the moisture content in the profile, with values higher than 19.00% and with maximum value equal to 43.64% VC.
机译：进行了六个测试，以评估在两个农业季节期间，鳄梨和柑桔园在利马里河谷（南纬30度36度，南纬12度12度，海拔218 m）中灌溉速率的应用。评估用水量，滴头流量和灌溉频率。此外，通过使用钻头直接对水分进行取样，对土壤剖面中存储的水分进行了监测，并与滴灌线和种植园行进行了深度和横向测量。在所研究的案例中，可能会发现有关剖面中存储的水的多种情况。在绝大多数情况下，无论是在根区还是在其下方，都发现了过量的水分状况。在极少数情况下，树木根部区域的水分达到接近永久枯萎百分比（PWP）的水平。这将反映出无论滴头的均匀度系数（UC）如何，通过滴灌实施和管理灌溉水的效率都很低。在粘土含量高的土壤中，这种情况变得更加棘手。为根系发育创造低通气条件。还可能观察到从水分剖面到种植系统较低或较陡峭部分的重要偏差;在较高的区域产生较干燥的土壤或湿度较低的环境，对根系发育产生很大影响。计算根区中存储的水量与剖面中可用总水量之间的关系时，得出的结果介于44％和73％之间，这些值反映了无效的灌溉条件。曲线中水分含量的高变异系数（VC）证实了这些结果，该变异系数的值高于19.00％，最大值等于VC的43.64％。

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