The result shows that the quality and the totall economical index of treatment with first irrigation at 25d and secondly irrigation at 50d after transplant,nitrogen dosage of 60kg per hectare are best.

Yield was increased by rising number of irrigation times.

In order to clarify the effects of irrigation frequency and potassium fertilization on population dry matter production and grain yield formation, two field experiments was carried out during 2006-2007 in Gaocheng County and 2007-2008 in Baoding with locally commercial winter wheat cultivar Henong 822 and Shixin 616 respectively.

The experiments during the two winter wheat growing seasons were arranged as split plot arrangement, with irrigation frequency as main plots ( including 0, 1, 2 and 3 times during the growing period on the basis of suitable pre-sowing soil moisture, expressed as W0, W1, W2 and W3, respectively ), and nitrogen application amounts as split plots ( including N 0, 112.

[Objective] This study intended to study whether irrigation frequency,fertilizing quantity and colonization density were the major factors which caused cracking prematurely in spring cabbage leafy head.

The experiments have four irrigation methods, including four treatments in dry cultivation (DC), damp irrigation (DI), the treatment C (controlled damp irrigation before booting stage, rational irrigation at booting stage, wetting-drying alternation irrigation from heading stage to mature stage.

The effect of two types of soil base and four nutrient level (Which contains 4 treatment) on growth and development, yield and its componet, photosynthetic feature, grain quality and WUE was studied, simultaneously, the effect of three irrigation methods on yield and WUE was primarily studied.

The paper in the basis of home and abroad successful experience for micro-irrigation technique applied in fruit,We made water consumption characteristics moisture index experiment and various irrigation method contrast test in Aksu area in 2008.