Tomato Root Response to Subsurface Drip Irrigation  

作　　者：ZHUGEYu-Ping ZHANGXu-Dong ZHANGYu-Long LIJun YANGLi-Juan HUANGYi LIUMing-Da 

机构地区：[1]KeyLaboratoryofTerrestrialEcologicalProcess,InstituteofAppliedEcology,ChineseAcademyofSciences,Shenyang110016（China）.E-mail：[e-mail] [2]LandandEnvironmentalCollege,ShenyangAgriculturalUniversity,Shenyang110161（China）

出　　处：《Pedosphere》2004年第2期205-212,共8页土壤圈（英文版）

基　　金：Project supported by the Chinese Academy of Sciences (CAS) (No. KZCX-SW-416-02), and the K. C. Wong Post Doctoral Research Award Fund of CAS (No. 29, 2002).

摘　　要：Four depth treatments of subsurface drip irrigation pipes were designated as 1) at 20,2) 30 and 3) 40 cm depths all with a drip-proof flumes underneath,and 4) at 30 cm without a drip-proof flume to investigate the responses of a tomato root system to different technical parameters of subsurface drip irrigation in a glass greenhouse,to evaluate tomato growth as affected by subsurface drip irrigation,and to develop an integrated subsurface drip irrigation method for optimal tomato yield and water use in a glass greenhouse. Tomato seedlings were planted above the subsurface drip irrigation pipe. Most of the tomato roots in treatment 1 were found in the top 0-20 cm soil depth with weak root activity but with yield and water use efficiency (WUE) significantly less (P ---- 0.05) than treatment 2; root activity and tomato yield were significantly higher (P = 0.05) with treatment 3 compared to treatment 1; and with treatment 2 the tomato roots and shoots grew harmoniously with root activity,nutrient uptake,tomato yield and WUE significantly higher (P= 0.05) or as high as the other treatments. These findings suggested that subsurface drip irrigation with pipes at 30 cm depth with a drip-proof flume placed underneath was best for tomato production in greenhouses. In addition,the irrigation interval should be about 7-8 days and the irrigation rate should be set to 225 m3 ha-1 per event.Four depth treatments of subsurface drip irrigation pipes were designated as1) at 20, 2) 30 and 3) 40 cm depths all with a drip-proof flumes underneath, and 4) at 30 cm withouta drip-proof flume to investigate the responses of a tomato root system to different technicalparameters of subsurface drip irrigation in a glass greenhouse, to evaluate tomato growth asaffected by subsurface drip irrigation, and to develop an integrated subsurface drip irrigationmethod for optimal tomato yield and water use in a glass greenhouse. Tomato seedlings were plantedabove the subsurface drip irrigation pipe. Most of the tomato roots in treatment 1 were found in thetop 0--20 cm soil depth with weak root activity but with yield and water use efficiency (WUE)significantly less (P = 0.05) than treatment 2; root activity and tomato yield were significantlyhigher (P = 0.05) with treatment 3 compared to treatment 1; and with treatment 2 the tomato rootsand shoots grew harmoniously with root activity, nutrient uptake, tomato yield and WUE significantlyhigher (P = 0.05) or as high as the other treatments. These findings suggested that subsurface dripirrigation with pipes at 30 cm depth with a drip-proof flume placed underneath was best for tomatoproduction in greenhouses. In addition, the irrigation interval should be about 7--8 days and theirrigation rate should be set to 225 m^3 ha^(-1) per event.

关 键 词：GREENHOUSE root system response soil water subsurface drip irrigation 

分 类 号：S275.6[农业科学—农业水土工程] S641.2[农业科学—农业工程]