PKN

After PKN treatment , two varieties of plant height , ear height , ground dry weight , root to shoot ratio decreased .

聚糠萘合剂处理后，两品种株高和穗位高下降，地上与地下部干物重增加，根冠比增加。

A new analytical model for pressure decline under the condition of forced fracture closure was developed on the basis of material balance theory and the former corresponding fracture models , such as PKN and KGD models .

以物质平衡原理和相关分析模型为基础，对PKN和KGD两种裂缝模型建立了裂缝强制闭合条件下的压力降落解释模型。

Considering the fracture temperature field , we calculated physical dimension of the fracture using PKN model , estimated the distribution of full-suspended fracturing fluid in the fracture and the conductivity of sand-packed fracture .

在考虑裂缝温度场对裂缝几何尺寸影响的基础上，使用PKN模型计算了裂缝的几何尺寸，计算了全悬浮携砂液在缝中的运移分布及填砂裂缝的导流能力。