便攜(xie)式(shi)土壤水分溫度(du)速測儀(yi)分為手動(dong)和自(zi)動(dong)2種(zhong)控制方(fang)式(shi)，手動(dong)運行時可手動(dong)開停灌溉電磁閥。

　　便攜式土壤水(shui)(shui)(shui)分溫(wen)(wen)度速測儀軟件控(kong)制程序中，由于水(shui)(shui)(shui)稻(dao)(dao)的不(bu)(bu)同生長(chang)時(shi)期需水(shui)(shui)(shui)量不(bu)(bu)同，因此PLC控(kong)制梯形(xing)圖的編寫(xie)只需按照流程圖，改變不(bu)(bu)同灌(guan)溉(gai)時(shi)期的水(shui)(shui)(shui)位與土壤濕度的上下限及(ji)灌(guan)水(shui)(shui)(shui)時(shi)間即可。根(gen)據(ju)水(shui)(shui)(shui)稻(dao)(dao)生長(chang)習性，水(shui)(shui)(shui)稻(dao)(dao)對(dui)水(shui)(shui)(shui)溫(wen)(wen)的要(yao)求一般在(zai)25～30℃比較合適，水(shui)(shui)(shui)溫(wen)(wen)過(guo)高對(dui)營(ying)養物質的積累不(bu)(bu)利，同時(shi)容易(yi)引(yin)起病蟲害(hai)，增加田間雜草(cao)。水(shui)(shui)(shui)溫(wen)(wen)過(guo)低(di)會(hui)使地溫(wen)(wen)降低(di)，肥料不(bu)(bu)易(yi)分解，稻(dao)(dao)根(gen)生長(chang)不(bu)(bu)良，植株矮，發育遲，稻(dao)(dao)穗小，產量降低(di)。因此灌(guan)溉(gai)水(shui)(shui)(shui)水(shui)(shui)(shui)溫(wen)(wen)在(zai)25℃左右時(shi)最利于水(shui)(shui)(shui)稻(dao)(dao)生長(chang)。

　　為(wei)提高灌(guan)溉(gai)(gai)水(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)溫(wen)，抽(chou)取(qu)灌(guan)溉(gai)(gai)用地下水(shui)(shui)(shui)(shui)(shui)需經太(tai)陽(yang)能(neng)加熱(re)控(kong)制(zhi)系統加溫(wen)后在進行灌(guan)溉(gai)(gai)，當太(tai)陽(yang)能(neng)曬(shai)水(shui)(shui)(shui)(shui)(shui)池(chi)水(shui)(shui)(shui)(shui)(shui)溫(wen)T（取(qu)曬(shai)水(shui)(shui)(shui)(shui)(shui)池(chi)4個溫(wen)度傳感器的平均值(zhi)），低于20℃時(shi)(shi)將池(chi)中水(shui)(shui)(shui)(shui)(shui)經循(xun)(xun)環(huan)(huan)泵（M）帶入太(tai)陽(yang)能(neng)系統，以此方法循(xun)(xun)環(huan)(huan)加溫(wen)使(shi)灌(guan)溉(gai)(gai)水(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)溫(wen)始終(zhong)保持(chi)在25℃左右。灌(guan)溉(gai)(gai)時(shi)(shi)，通(tong)過便攜式土(tu)壤水(shui)(shui)(shui)(shui)(shui)分溫(wen)度速測(ce)儀檢測(ce)到得流(liu)量、田間液位以及(ji)土(tu)壤水(shui)(shui)(shui)(shui)(shui)分，在水(shui)(shui)(shui)(shui)(shui)稻的不(bu)同生(sheng)長時(shi)(shi)期改變他們的預設上下限(xian)值(zhi)，來控(kong)制(zhi)灌(guan)水(shui)(shui)(shui)(shui)(shui)量及(ji)灌(guan)水(shui)(shui)(shui)(shui)(shui)時(shi)(shi)間。

儀器名稱：便攜式土壤水分溫度速測儀

儀器型號：TZS-IIW

更多產品：

托普儀器(qi) //www.trsfyq.com/