Research Of Facilities Cucumber Water Consumption And Water Saving Irrigation System

In recent years, the fast development of facilities vegetables industry in China, ranging from size to production in the world. But the current facilities of irrigation starting point in the process of vegetable control there exists a certain blindness, just unilaterally pursuing high yield, to a certain extent may result in serious waste of water resources, reducing crop water use efficiency. In addition vegetables fruit quality cannot guarantee. Lower limit and the suitable soil moisture is to determine the appropriate irrigation starting point of the important means of greenhouse cucumber. On the one hand, need to find out the water consumption of vegetables growth period of some important on the other hand to effect such as water saving, high yield and high quality to comprehensive evaluation of appropriate irrigation limit. Aiming at the shortage of water resources, land resources and the vegetables planting benefit maximization for the principal contradiction, make full use of the limited water resources and land resources. So in Beijing irrigation experiment center yongle stores base to carry out the water consumption and water saving irrigation irrigation system of greenhouse cucumber experiment and theoretical study. From the analysis on greenhouse environmental change, soil moisture migration, cucumber water consumption are discussed. Combined with the observation of plant physiological index under different water treatment, suitable for irrigation of greenhouse cucumber starting point and the system of water-saving irrigation. Mainly made the following findings:(l)Flowering early Guaqi irrigation limit of65%of the most beneficial cucumber processing plant height, stem diameter, leaf area growth. Sheng melon fruit stage at the end of the cucumber plant height growth conducive to irrigation should limit of70%, while80%of long-term excessive irrigation limit deal will make the leggy plants,70%of the irrigation limit has been able to meet the cucumber processing plant height, stem thick, filled melon leaf area in the late Guaqi needs.(2)Cucumber leaf stomatal conductance, photosynthetic rate, transpiration rate increased with the increase of irrigation limit increases by reducing irrigation water deficit measures cucumber limit is not conducive to photosynthesis of cucumber leaves.(3)Whether the inter-row direction, or the direction of the line at the same depth, cucumber root root length density increased with decreasing irrigation limit. When the soil is dry, but the lower limit irrigation cucumber roots initiative to promote the growth of the soil deep to find water, so as to promote root growth. Therefore, due to lower irrigation limit but is conducive to the growth of cucumber roots. Drip Irrigation facilities and proposed irrigation schemes cucumber moist layer depth of30cm.(4)Irrigation cucumber reduced abbeymycin Vc content, total soluble sugar content, with the increase of water consumption showing a decreasing trend after the first increase. Regression analysis can be drawn, when water consumption is363.80mm, cucumber abbeymycin reduced Vc content of up to101.9mg/kg; water consumption371.42mm, this time Guatiao total soluble sugar content of up to2.81%; appropriate increase the amount of flowering early Guaqi help improve irrigation cucumber Guatiao crude protein content.(5)Early melon, cucumber no significant effect on the yield limit irrigation, irrigation should set a lower limit of65%, but also can significantly improve water use efficiency, water conservation in order to achieve the purpose of insurance assets. Into the fruit stage, a significant increase in water demand cucumber, a higher limit is more conducive to irrigation cucumber yield increases, so to ensure higher irrigation limit of80%.(6)In order to take into account the yield, quality, water use efficiency, it is recommended Drip Irrigation Greenhouse Cucumber under local climatic conditions, seedling irrigation intensity of1.651mm/d; flowering early Guaqi irrigation intensity of2.889mm/d; Sheng melon End Guaqi irrigation intensity of2.692mm/d; growth period irrigation intensity of2.559mm/d, up to high-yield, high-quality, water-saving goals.