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1.覆(fu)土(tu)層(ceng)在(zai)料(liao)麵(mian)可(ke)以(yi)造(zao)成(cheng)一(yi)個(ge)溫(wen)濕(shi)度(du)較(jiao)為(wei)穩(wen)定(ding)的(de)小(xiao)氣(qi)候(hou)，有(you)利(li)於(yu)菌(jun)蕾(lei)的(de)形(xing)成(cheng)。覆(fu)土(tu)以(yi)後(hou)，使(shi)裸(luo)露(lu)的(de)料(liao)麵(mian)增(zeng)加(jia)了(le)一(yi)層(ceng)保(bao)護(hu)層(ceng)，既(ji)能(neng)緩(huan)和(he)溫(wen)度(du)的(de)變(bian)化(hua)，又(you)能(neng)降(jiang)低(di)水(shui)分(fen)的(de)蒸(zheng)發(fa)，使(shi)得(de)土(tu)層(ceng)內(nei)有(you)一(yi)個(ge)較(jiao)為(wei)穩(wen)定(ding)的(de)小(xiao)氣(qi)候(hou)環(huan)境(jing)。
2.覆fu土tu後hou改gai變bian了le料liao麵mian和he土tu層ceng二er氧yang化hua碳tan和he氧yang氣qi的de比bi例li，促cu進jin菌jun絲si扭niu結jie成cheng子zi實shi體ti。蘑mo菇gu菌jun絲si體ti和he子zi實shi體ti對dui二er氧yang化hua碳tan的de耐nai受shou力li是shi有you差cha異yi的de。覆fu土tu以yi後hou引yin起qi料liao麵mian和he土tu層ceng中zhong二er氧yang化hua碳tan含han量liang的de變bian化hua，從cong而er控kong製zhi蘑mo菇gu菌jun絲si在zai土tu層ceng中zhong的de生sheng長chang，使shi之zhi及ji時shi形xing成cheng菌jun蕾lei。
3.覆fu土tu後hou改gai變bian了le營ying養yang條tiao件jian，促cu進jin菌jun絲si在zai營ying養yang較jiao差cha的de土tu層ceng中zhong由you營ying養yang生sheng長chang轉zhuan向xiang生sheng殖zhi生sheng長chang。蘑mo菇gu菌jun絲si在zai營ying養yang豐feng富fu的de培pei養yang料liao內nei生sheng長chang旺wang盛sheng，當dang生sheng長chang到dao覆fu土tu層ceng時shi由you於yu營ying養yang成cheng分fen含han量liang甚shen微wei，生sheng長chang就jiu受shou抑yi製zhi，從cong而er轉zhuan向xiang生sheng殖zhi發fa育yu而er結jie菇gu。
4.覆土對料表菌絲的物理性刺激作用，可促進子實體的形成。這種物理刺激有利於蘑菇菌絲的扭結和分化。
5.futucengkesuishigonggeimogushengchangsuoxudedaliangshuifen。mogushengchangfayuguochengzhongdezhouqixingbianhua，jiaoqitashiyongjungengweituchumingxian。yincichuguwangqixuyaobuchongdaliangdeshuifen，gongmoguxishou。jiarumeiyoutuceng，liaomiannanyichengshouzheyangdedaliangdeshuifen，ertucengjinengxishouzhucunzheyangduodeshuifen，kongxijianyouyouzugoudekongqigongmoguxishou，yinernengweichimogudezhengchangshengchangfayu。
6.覆土層可支持蘑菇子實體的正常生長。蘑菇子實體在裸露的料麵上無法正常直立生長，而覆土層卻起到了一種支撐子實體生長的作用。
