Meanwhile, fracture data and operation dala optimization, mate-hing with the fraeturing fluid ingredient adapting the reservoir fluid, obtains satisfied stimulation effect in the test wells.

Aimed at the blindness in application and difficulty of forecasting the stimulation effect in using vibration production, this paper studies the effects of vibration field on crude oil seepage flow.

The yield-increasing effect of the yield-enhancing QTLs was studied with the 15 hybrid combinations and Liangyou Peijiu(Pei′ai 64S/9311,as the check,a pioneer medium super hybrid rice combination) as materials.

Root-cutting method,models of hoe steels or cutting blades assembled,are the most important factors influencing root-cutting quality and yield-increasing effect.

There is very striking yield-increasing effect applying silicon fertilizer 30～40kg/667m 2.

They are advantageous to roots and dried matter growth and accumulate,increase the rate of twin-spike,and have clear effect of activation and regulate to plants,Effect of increasing production is quite clear.

The results showed that application of potassium fertilizer could increase the plant height and yield of summer maize to a certain extent,and the yield increasing effect of potassium fertilizer application on soil of lower content of potassium was significant,while that on soil of higher content of potassium was not signifi.

The results showed that the yield increased by Ammonia Resistant Strains of N2-fixing Bacteria (ARSNFB) was insignificant when nitrogen was supplied enough at the recommended amount.