首页|Changes in Soil Properties Under the Influences of Cropping and Drip Irrigation During the Reclamation of Severe Salt-Affected Soils

Changes in Soil Properties Under the Influences of Cropping and Drip Irrigation During the Reclamation of Severe Salt-Affected Soils

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  • 国家科技期刊平台
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  • NSTL
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Reclamation of salt-affected land plays an important role in mitigating the pressure of agricultural land due to competition with industry and construction in China. Drip irrigation was found to be an effective method to reclaim salt-affected land. In order to improve the effect of reclamation and sustainability of salt-affected land production, a field experiment (with reclaimed 1-3 yr fields) was carried out to investigate changes in soil physical, chemical, and biological properties during the process of reclamation with cropping maize and drip irrigation. Results showed that soil bulk density in 0-20 cm soil layer decreased from 1.71 g cm-3 in unreclaimed land to 1.44 g cm-3 in reclaimed 3 yr fields, and saturated soil water content of 0-10 cm layer increased correspondingly from 20.3 to 30.2%. Both soil salinity and pH value in 0-40 cm soil layer dropped markedly after reclaiming 3 yr. Soil organic matter content reduced, while total nitrogen, total phosphorus, and total potassium all tended to increase after cropping and drip irrigation. The quantities of bacteria, actinomycete, and fungi in 0-40 cm soil layer all greatly increased with increase of reclaimed years, and they tended to distribute homogeneously in 0-40 cm soil profile. The urease activity and alkaline phosphatase activity in 0-40 era soil layers were also enhanced, but the sucrase activity was not greatly changed. These results indicated that after crop cultivation and drip irrigation, soil physical environment and nutrients status were both improved. This was benefit for microorganism's activity and plant's growth.

reclamationdrip irrigationchanges of soil propertiessalt-affected soil

TAN Jun-li、KANG Yue-hu

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Key Laboratory of Water Cycle and Related and Land Surface Processes, Institute of Geographic Sciences and Natural Resource Research,Chinese Academy of Sciences, Beijing 100101, P.R.China

Graduate School, Chinese Academy of Sciences, Beijing 100039, P.R.China

Chinese Academy of Sciences Action Plan for the Development of Western ChinaChinese Acad-emy of Sciences Knowledge Innovation ProjectChinese Academy of Sciences

KZCX2-XB2-13KSCX2-YW-N-080

2009

10.1016/S1671-2927(08)60333-8

农业科学学报(英文)
中国农业科学院农业信息研究所

农业科学学报(英文)

影响因子：0.576
ISSN：2095-3119
年,卷(期)：2009.8(10)
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