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Agricultural University of Hebei (2014)

Research on Efficient Utilization of Water and Soil Resources in Water Shortage Region of Hebei Province


Titre : Research on Efficient Utilization of Water and Soil Resources in Water Shortage Region of Hebei Province

Auteur : 刘胜尧;

Grade : Doctoral Dissertation 2014

Université : Agricultural University of Hebei

Résumé partiel
The water resource is very insufficient in Hebei Province. In fact, water insufficientdistricts cover more than50%of the total area in Hbei Province, which have become animportant influencing factor to agriculture development. In this paper, focusing on the highefficient utilization of water resources of saline groundwater in low plain and precipitationin hilly region of Hebei Province, the study carries out control experiments and fieldexperiments in Luquan Experimental Station of Hebei Academy of Agriculture andForestry Sciences from2010to2013to reveal the farming production principle underdifferent water types of constraints and focusing on water and soil, find out an approach totechnological innovation in efficiently utilizing the regional earth-atmosphereresources.Being confronted with the resources background of shortage in fresh water andrich in mineralized shallow ground water, the experiment is designed that using salinewater irrigation, the production of salt tolerant economic crop is under environmentalcontrol. In order to achieve effective alternatives to fresh water resources, using economicbenefit compensates facilities cost. In the treatments, using different concentration saltwater and soil matric potential to research irrigate salt tolerant tomatoes at different growthstages reveals tomato sensitivity to concentration salt water irrigation and soil matricpotential in tomato’s different growth stages and finds out the threshold stage and theproper concentration of salt water irrigation. The purpose of the experiment is to supply thebase of theory and technology on saline water use and scientific irrigation in vegetableproduction under solar greenhouse in low plain area of Hebei Province.In the backgroundof rich in light and heat resources but lack of rainfall in hilly area in Hebei province, theexperiment, based on soil retention of rainfall resource, has used peritoneal and ridgeculture, water retention and catchment planting of drought resistant plants and thecompound planting of drought resistant and high-yield plants, and at the same time, takenadvantage of the differences of water ecological adaptability among different plants andthe mechanism of the complementary use of water and soil resource to achieve theeffective transformation of rainfall resource in cropland during growing stage. The paper,through researching on soil moisture and temperature effects, photo-synthetically activeradiation, dry material accumulative transfer and regularity of N, P, K absorption anddistribution, enucleates transformation mechanisms of resource soil and water andregularity of yield forming of intercropping system of spring sweet potato and spring maize under ridge tillage with plastic film mulching cultivation. It provides theoretical andtechnological supports for adjusting production structure of regional crop and utilizingefficiently farmland water and soil resources.1The results indicate that there are remarkable differences of salt-tolerance capacityat different growth periods of tomato. That means the blooming and earlier fruit periods aremore sensitive to soil matric potential and salt stress than other stages. The most adaptedone to salt stress is the harvest period. The data shows that the salinity of salt waterirrigation should be less than the3g/L at both the whole growth period and the bloomingand the fruit period, and less than5g/L at the fruit enlargement period. Relatively, highconcentration salt water irrigation of7g/l-9g/l can be used at the harvest period. The resultis different between the relationship of yield at different growing periods and the soilmatric potential, the concentration salt. The conicoid relationship was found in thetomatoes yield and the concentration salt, the soil matric potential at the whole growthperiod and the blooming and the fruit period, and the effect on the yield is significant.However, only the concentration salt has significant effects on the yield at fruitenlargement period,and there is a parabolic relation between the concentration salt and thetomatoes yield. The two factors at harvest period have no effects on the tomatoes yield.The relationship between the concentration salt, the soil matric potential and the rootweight could be expressed by a conicoid relationship. The concentration salt at wholegrowth period has significant effects on the root weight, and there is a significantinteraction between the concentration salt and the soil matric potential. Only theconcentration salt has significant effects on the root weight at the blooming period, andthere is a parabolic relation between the concentration salt and the tomatoes root weight.The effect of the tomatoes root weight is not significant at the fruit enlargement period andthe harvest period in every. The positive linear relationship is shown between the soilsalinity and the concentration salt, the soil matric potential in all growth stages. The saltcontent would increased50%~400%by using the brackish water resources with mineralconcentration between3~9g/L to irrigate. Salt water irrigation will result in the soil saltaccumulation in green house production systems. The water consumption of irrigatingtomatoes is positively correlated with the soil matric potential at every growth period,however, negatively correlated with the concentration salt. Hence, the effect of salt waterirrigation on plant growth appeared the "from control to promotion" regulating trendswhile a moderate amount is chosen, which will help reduce the water consumption andimprove tomato yield and WUE. As a result,based on the characteristics of salt toleranceof tomato at different growth periods, the use of a certain concentration of salt waterirrigation can not only replace the fresh water but also improve WUE.2The result showed that plastic mulching treatment in the early growth stage (fromsowing stage to tasseling stage) could significantly add the soil temperature at5,10,15,20 cm depths and increase1 3℃, increase accumulated temperature155.2 280.9℃,lengthened growth period5.9 10.7d compared with the CK(flat with bare land).

Mots clés : Tomato; Spring maize; Spring sweet potato; Saline water irrigation; Modes ofplastic film mulching; Intercropping system; WUE;

Présentation (CNKI)

Page publiée le 28 septembre 2017