棒球場地的面層(ceng)是由土(tu)(tu)層(ceng)和草(cao)坪兩部分(fen)組成。見(jian)圖3.3.1及(ji)圖3.3.2兩種(zhong)。其(qi)結構層(ceng)因條件(jian)不同(tong)組成也有不同(tong)，如土(tu)(tu)質層(ceng)，天(tian)然草(cao)坪層(ceng)，人造草坪層等。但在(zai)同(tong)一(yi)場地內應選(xuan)用同(tong)一(yi)種草坪。

常見土(tu)質(zhi)場地結構，表面(mian)為經加工處理過的燒(shao)結土(tu)作面(mian)層(ceng)(ceng)，基(ji)層(ceng)(ceng)為砂礫(li)或天(tian)然(ran)砂石見圖(tu)3.3.2.草(cao)(cao)(cao)坪(ping)場地結構:天(tian)然(ran)草(cao)(cao)(cao)坪(ping)主(zhu)要由(you)(you)天(tian)然(ran)草(cao)(cao)(cao)苗、肥(fei)土(tu)層(ceng)(ceng)、砂性土(tu)層(ceng)(ceng)、礫(li)石層(ceng)(ceng)、土(tu)層(ceng)(ceng)組成見圖(tu)3.3.2.人造草(cao)(cao)(cao)坪(ping)主(zhu)要由(you)(you)人造草(cao)(cao)(cao)、瀝青混凝(ning)土(tu)基(ji)層(ceng)(ceng)、無(wu)機結合料(liao)底(di)(di)層(ceng)(ceng)，或由(you)(you)人造草(cao)(cao)(cao)、水泥混凝(ning)土(tu)基(ji)層(ceng)(ceng)、白(bai)灰土(tu)底(di)(di)層(ceng)(ceng)等組成見圖(tu)3.3.2