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Improvements of soil salt characteristics and nutrient status in an impermeable saline-sodic soil reclaimed with an improved drip irrigation while ridge planting Lycium barbarum L.
Zhang, Tibin1,2,3; Zhan, Xiaoyun1; Kang, Yaohu4; Wan, Shuqin4; Feng, Hao1,2,3
2017-04-01
Source PublicationJOURNAL OF SOILS AND SEDIMENTS
ISSN1439-0108
Volume17Issue:4Pages:1126-1139
Corresponding AuthorKang, Yaohu(kangyh@igsnrr.ac.cn)
AbstractTakyric solonetz is spread widely across the arid area of northwest China. The extremely poor soil structure and low hydraulic conductivity (K-s < 0.1 mm day(-1)) hinder its amelioration. The purpose of this study was to investigate the soil salt leaching characteristics, nutrient contents, and distributions in the impermeable saline-sodic soil reclaimed with an improved drip irrigation method, and to explore the impacting mechanisms of agronomic practices involved on the amelioration. A 3-year field experiment was conducted to investigate the success of planting Lycium barbarum L. in the highly saline-sodic wasteland of takyric solonetz using drip irrigation. The soil beneath the drip emitters near the plants was replaced with sand in niches that were 0.2 m in ground diameter and 0.2 m deep. Five treatments based on soil matric potential (SMP) were designed to find the optimal irrigation schedule: -5 kPa (S1), -10 kPa (S2), -15 kPa (S3), -20 kPa (S4), and -25 kPa (S5). A significant improvement was found in soil infiltration capability, which was demonstrated by the increasingly enlarged wetted area beneath the drip emitter. This improvement was resulting from the combined affects of all the agronomic practices involved, including drip irrigation, sand-filled niches, film mulching. After 3 years, soil salt leaching rates in S1-S5 root zones were 68.16 , 39.45 , 26.56 , 25.14 and 10.40%, respectively, indicating that the higher SMP improved soil salt leaching. The increased soil ECe/SAR ratio reflected the amelioration of soil physical properties. After planting, the soil nutrient status considerably improved. N fertilizer, which often was leached away, should be applied in the latter half of an irrigation event. Available P content in the soil was relatively low and it was necessary to apply adequate P fertilizer to meet crop growth needs, while the studied soil was rich in K and moderate supplement of K fertilizer was proposed. After 3 years, S2, S3, and S4 produced the significantly higher dry fruit yields (similar to 900 kg ha(-1)), which were close to those produced by local farmland. Our findings indicated that an improved drip irrigation made the reclamation of an impermeable saline-sodic soil possible. The key operations included drip irrigation, sand-filled niches beneath drip emitters, ridge tillage, film mulching, and the use of thresholds to control SMP.
KeywordDrip irrigation Saline-sodic soil Salt leaching Soil infiltration Soil matric potential
DOI10.1007/s11368-016-1600-5
WOS KeywordPHYSICOCHEMICAL PROPERTIES ; AMELIORATION STRATEGIES ; HYDRAULIC CONDUCTIVITY ; AMMONIUM-NITRATE ; CARBON DYNAMICS ; RECLAMATION ; WATER ; GROWTH ; AREA ; FERTIGATION
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51509238] ; National Natural Science Foundation of China[41503078] ; Fundamental Research Funds for Northwest AF University[2452015091] ; Light of West China program of Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China ; Fundamental Research Funds for Northwest AF University ; Light of West China program of Chinese Academy of Sciences
WOS Research AreaEnvironmental Sciences & Ecology ; Agriculture
WOS SubjectEnvironmental Sciences ; Soil Science
WOS IDWOS:000398780500022
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/64588
Collection中国科学院地理科学与资源研究所
Corresponding AuthorKang, Yaohu
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Soil & Water Conservat, Natl Engn Res Ctr Water Saving Irrigat Yangling, Yangling 712100, Shaanxi, Peoples R China
3.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Tibin,Zhan, Xiaoyun,Kang, Yaohu,et al. Improvements of soil salt characteristics and nutrient status in an impermeable saline-sodic soil reclaimed with an improved drip irrigation while ridge planting Lycium barbarum L.[J]. JOURNAL OF SOILS AND SEDIMENTS,2017,17(4):1126-1139.
APA Zhang, Tibin,Zhan, Xiaoyun,Kang, Yaohu,Wan, Shuqin,&Feng, Hao.(2017).Improvements of soil salt characteristics and nutrient status in an impermeable saline-sodic soil reclaimed with an improved drip irrigation while ridge planting Lycium barbarum L..JOURNAL OF SOILS AND SEDIMENTS,17(4),1126-1139.
MLA Zhang, Tibin,et al."Improvements of soil salt characteristics and nutrient status in an impermeable saline-sodic soil reclaimed with an improved drip irrigation while ridge planting Lycium barbarum L.".JOURNAL OF SOILS AND SEDIMENTS 17.4(2017):1126-1139.
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