查询词典 border irrigation

Numerical model of border or furrow irrigation flow movement is a necessary tool and approach to design and evaluate surface irrigation systems.

数值模拟畦灌水流运动过程可为地面灌溉系统设计与评价提供必要的工具和手段。

Based on the field experiments, the daily variations of photosynthesis rate and transpiration rate and water use efficiency were compared on the condition of sprinkle irrigation and border flooding irrigation.

通过定点定位试验，比较了喷灌与常规畦灌条件下农田生态环境、冬小麦光合速率和蒸腾速率的日变化特征以及不同水平的水分利用效率。

Testified by some research results and field experiments, it is shown that the model is reasonable and has some advantages, such as strict physical foundation, simple calculation and solution, higher accuracy. So it can be used to decide the reasonable technical indexes of border irrigation.

结合已有文献资料和田间试验对模型进行检验，表明所提出计算下渗水形状系数的简化公式和经验公式是可靠的，以此建立的水流推进简化模型具有严谨的物理基础，且计算求解方便、精度较高，可用于畦灌合理灌水技术指标的确定。

The curve of drip irrigation's soil moisture content with corn's stage was smoother than that of border and furrow irrigation.

播前玉米地土壤含水率随土层深度增加而增加，收获后土壤含水率则随土壤深度的增加而减小。

The relationships between surface-water depth and distance from water inlet are fitted by a nonlinear least-square method,and then,based on the principle of water balance a linear regression method is proposed for estimating the soil infiltration parameters of border irrigation.

将畦灌地表水深与离畦首的距离之间的关系按指数函数进行非线性最小二乘拟合，并根据水量平衡原理提出了估算土壤入渗参数的线性回归法，避开了难以定值的地表储水形状系数。

Under the conditions of border irrigation, the total quantity of water consumption and water consumption intensity among different agronomic measures had little difference, but the differences of yield and water production efficiency had greater differences.

在畦灌条件下，不同农艺措施之间耗水总量和耗水强度差异不大，但产量和水分生产效率差异较大。

China is a large country of irrigated agriculture, in which the shortage of water resources is very serious. Due to the underdevelopment of economy, traditional irrigation such as border and furrow irrigation is still taken as the dominant way in farmland irrigation, which leads to the great waste of water resources.

我国是一个灌溉农业大国，水资源紧缺问题十分严重，但是由于经济欠发达，农田灌溉仍以传统的畦灌、沟灌等地面灌溉技术为主，水资源浪费现象还比较严重，因此，开展节水灌溉的研究势在必行。

Based on water balance model, the change of figure coefficients of infiltration water and surface water storage under border irrigation was analyzed. The power index of movement distance and time has little influence on the figure coefficient of infiltration water in the course of surface water movement, which can be substituted by a stable value.

该文依据水量平衡模型，分析畦灌下渗水形状系数、地表储水形状系数的变化规律，结果表明下渗水形状系数受地表水推进过程中的推进距离和时间的幂指数影响很小，可用一个稳定值代替，由此建立了基于水量平衡原理的畦灌水流推进简化解析模型。

The sophon surge border irrigation with pipeline is simulated by compiling Matlab program.

利用牛顿-辛普森迭代法和双扫描法对该模型进行求解，用Matlab模拟虹吸式波涌管道畦灌的水流运动过程，所建立的模型能较好的模拟田面水流的运动状态。

It was carried out to optimize combination scheme experiment of three factors among level-border specifications, irrigation quota and fertilizer methods under the condition of level-border + plastic film irrigation for corn in the sand of soil by cross experiment methods.

为了研究玉米水平畦灌与膜上灌复合节水节肥的效果，采用正交试验法，在沙性土壤上，对复合灌水条件下的水平畦田规格、灌水定额和施肥方式3因素的最优组合方案进行了试验研究。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。