【摘要】：針對當(dāng)前國內(nèi)外墑情傳感器分層布置的習(xí)慣及降低傳感器埋設(shè)量的愿望,研究了蔬菜大棚墑情傳感器在垂向上的代表性問題。以江蘇省宿遷市宿城區(qū)番茄大棚為例,利用Hydrus-1D模型分別模擬番茄苗期、開花坐果期和盛果采摘期灌水之后15 d內(nèi)的根系層內(nèi)含水率分布變化的情況。根據(jù)模擬結(jié)果,將40 cm的主要根系層平均分為10個土層,通過對灌水后各個土層含水率與根系層平均含水率進行顯著性檢驗,進一步將無顯著性差異土層內(nèi)各測點的含水率與根系層平均含水率進行比較。結(jié)果表明,10~16 cm深度區(qū)域的土壤含水率基本能夠代表根系層的平均含水率。因此,蔬菜大棚內(nèi)單個墑情傳感器應(yīng)當(dāng)埋設(shè)在10~16 cm的深度范圍。
[Abstract]:In view of the habit of layered arrangement of moisture sensors at home and abroad and the desire to reduce the amount of sensors embedded, the representative problem of soil moisture sensors in vegetable greenhouse in vertical direction was studied. Taking the tomato shed in Sucheng District of Suqian City, Jiangsu Province as an example, Hydrus-1D model was used to simulate the distribution of water content in root layer within 15 days after irrigation at seedling stage, flowering and fruit setting stage and fruit picking stage, respectively. According to the simulation results, the main root layer of 40 cm was divided into 10 soil layers on average, and the moisture content of each soil layer and the average water content of root layer after irrigation were tested significantly. Furthermore, the average moisture content of root layer was compared with the water content of each measuring point in the soil layer without significant difference. The results showed that the soil moisture content in the 10 ~ (10) ~ (16) cm depth region could represent the average water content of root layer. Therefore, a single moisture sensor in vegetable greenhouse should be embedded in the depth range of 10 ~ 16 cm.
【作者單位】： 楊凌職業(yè)技術(shù)學(xué)院水利工程學(xué)院;河海大學(xué)水利水電學(xué)院;河海大學(xué)水文水資源與水利工程科學(xué)國家重點實驗室;
【基金】：水利部公益性行業(yè)科研專項經(jīng)費項目(201301014)
【分類號】：S152.7;TP212

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