濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)和(he)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)（統(tong)稱(cheng)國(guo)外(wai)(wai)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)或“兩(liang)(liang)(liang)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)”），都是從美國(guo)引(yin)進的(de)(de)(de)(de)(de)(de)優(you)良針葉樹(shu)種，由于(yu)(yu)其適應(ying)(ying)性廣(guang)(guang)、生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)快(kuai)、經濟價值高(gao)(gao)(gao)，深受各(ge)地(di)(di)(di)(di)(di)喜(xi)愛，現已成為我國(guo)南方(fang)營(ying)造(zao)(zao)豐(feng)產(chan)(chan)林(lin)（材(cai)脂(zhi)兩(liang)(liang)(liang)用林(lin)）的(de)(de)(de)(de)(de)(de)主要(yao)樹(shu)種之一(yi)。但因“兩(liang)(liang)(liang)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)”的(de)(de)(de)(de)(de)(de)特(te)性不(bu)完全相(xiang)同(tong)(tong)，因此(ci)(ci)在(zai)(zai)(zai)(zai)栽(zai)培(pei)上(shang)要(yao)因地(di)(di)(di)(di)(di)制(zhi)宜(yi)、揚(yang)長(chang)(chang)(chang)避短，才能發揮(hui)其各(ge)自(zi)的(de)(de)(de)(de)(de)(de)優(you)勢(shi)，實現最好的(de)(de)(de)(de)(de)(de)經濟效(xiao)益(yi)。研究(jiu)表(biao)明，“兩(liang)(liang)(liang)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)”的(de)(de)(de)(de)(de)(de)差異主要(yao)表(biao)現在(zai)(zai)(zai)(zai)以(yi)(yi)下幾個方(fang)面(mian)(mian)： 濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)早期(qi)生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)快(kuai)，火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)后期(qi)長(chang)(chang)(chang)勢(shi)猛(meng)。在(zai)(zai)(zai)(zai)造(zao)(zao)林(lin)后的(de)(de)(de)(de)(de)(de)前10年(nian)(nian)，濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)量(liang)(liang)(liang)大(da)(da)于(yu)(yu)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)；10～15年(nian)(nian)生(sheng)(sheng)(sheng)(sheng)(sheng)兩(liang)(liang)(liang)者大(da)(da)體持(chi)平(ping)；15年(nian)(nian)生(sheng)(sheng)(sheng)(sheng)(sheng)后樹(shu)高(gao)(gao)(gao)生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)亦(yi)大(da)(da)致相(xiang)等(deng)，但火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)胸(xiong)徑生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)逐年(nian)(nian)增大(da)(da)；20年(nian)(nian)生(sheng)(sheng)(sheng)(sheng)(sheng)后濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)胸(xiong)徑小(xiao)于(yu)(yu)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)20%左右。因此(ci)(ci)，如(ru)營(ying)造(zao)(zao)短輪伐(fa)期(qi)豐(feng)產(chan)(chan)林(lin)，可選(xuan)栽(zai)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)，如(ru)需培(pei)育中、大(da)(da)徑材(cai)，則(ze)應(ying)(ying)栽(zai)植(zhi)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)。 火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)喜(xi)雨(yu)(yu)(yu)水(shui)，雨(yu)(yu)(yu)水(shui)多的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)區火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)量(liang)(liang)(liang)大(da)(da)于(yu)(yu)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)。這一(yi)特(te)性在(zai)(zai)(zai)(zai)美國(guo)原產(chan)(chan)地(di)(di)(di)(di)(di)表(biao)現的(de)(de)(de)(de)(de)(de)非常明顯。在(zai)(zai)(zai)(zai)我國(guo)南方(fang)亦(yi)類似。在(zai)(zai)(zai)(zai)年(nian)(nian)降(jiang)雨(yu)(yu)(yu)量(liang)(liang)(liang)1000毫(hao)米(mi)以(yi)(yi)下的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)方(fang)，火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)長(chang)(chang)(chang)勢(shi)差，20年(nian)(nian)生(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)積低(di)20％左右；而(er)在(zai)(zai)(zai)(zai)降(jiang)雨(yu)(yu)(yu)量(liang)(liang)(liang)1600毫(hao)米(mi)以(yi)(yi)上(shang)的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)方(fang)，火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)則(ze)比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)量(liang)(liang)(liang)高(gao)(gao)(gao)20％以(yi)(yi)上(shang)。 濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)耐(nai)瘠(ji)薄(bo)。在(zai)(zai)(zai)(zai)立(li)地(di)(di)(di)(di)(di)條件(jian)差的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)方(fang)，濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)長(chang)(chang)(chang)勢(shi)優(you)于(yu)(yu)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)，而(er)在(zai)(zai)(zai)(zai)立(li)地(di)(di)(di)(di)(di)條件(jian)較(jiao)好的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)方(fang)，火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)量(liang)(liang)(liang)大(da)(da)于(yu)(yu)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)。因此(ci)(ci)，在(zai)(zai)(zai)(zai)立(li)地(di)(di)(di)(di)(di)條件(jian)較(jiao)好的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)方(fang)宜(yi)栽(zai)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)，而(er)在(zai)(zai)(zai)(zai)立(li)地(di)(di)(di)(di)(di)條件(jian)較(jiao)差的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)方(fang)應(ying)(ying)營(ying)造(zao)(zao)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)。 火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)耐(nai)寒，濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)耐(nai)高(gao)(gao)(gao)溫(wen)、高(gao)(gao)(gao)濕(shi)(shi)(shi)(shi)(shi)(shi)。在(zai)(zai)(zai)(zai)氣溫(wen)較(jiao)低(di)、濕(shi)(shi)(shi)(shi)(shi)(shi)度較(jiao)小(xiao)的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)方(fang)，宜(yi)以(yi)(yi)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)造(zao)(zao)林(lin)為主；氣溫(wen)較(jiao)高(gao)(gao)(gao)、濕(shi)(shi)(shi)(shi)(shi)(shi)度較(jiao)大(da)(da)的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)區則(ze)應(ying)(ying)以(yi)(yi)發展濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)為主。 “兩(liang)(liang)(liang)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)”同(tong)(tong)屬陽性樹(shu)種，但火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)早期(qi)較(jiao)耐(nai)陰，在(zai)(zai)(zai)(zai)陰坡比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)生(sheng)(sheng)(sheng)(sheng)(sheng)長(chang)(chang)(chang)好。如(ru)湖南某林(lin)場20年(nian)(nian)生(sheng)(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)(de)(de)(de)林(lin)分(fen)，在(zai)(zai)(zai)(zai)陰坡“兩(liang)(liang)(liang)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)”的(de)(de)(de)(de)(de)(de)樹(shu)高(gao)(gao)(gao)相(xiang)同(tong)(tong)，但胸(xiong)徑火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)大(da)(da)30%以(yi)(yi)上(shang)。因此(ci)(ci)陰坡宜(yi)栽(zai)植(zhi)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)。 火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)根(gen)系(xi)入土(tu)比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)深，且(qie)分(fen)布(bu)廣(guang)(guang)。火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)有效(xiao)根(gen)系(xi)分(fen)布(bu)在(zai)(zai)(zai)(zai)30厘米(mi)以(yi)(yi)下土(tu)壤中，濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)有效(xiao)根(gen)系(xi)多分(fen)布(bu)在(zai)(zai)(zai)(zai)20厘米(mi)的(de)(de)(de)(de)(de)(de)地(di)(di)(di)(di)(di)表(biao)層中。在(zai)(zai)(zai)(zai)較(jiao)瘠(ji)薄(bo)的(de)(de)(de)(de)(de)(de)土(tu)壤上(shang)，濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)根(gen)系(xi)時而(er)裸露在(zai)(zai)(zai)(zai)地(di)(di)(di)(di)(di)表(biao)上(shang)，火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)則(ze)少有這種現象。 濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)產(chan)(chan)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)脂(zhi)量(liang)(liang)(liang)高(gao)(gao)(gao)。據測定，同(tong)(tong)為20年(nian)(nian)生(sheng)(sheng)(sheng)(sheng)(sheng)胸(xiong)徑30厘米(mi)的(de)(de)(de)(de)(de)(de)國(guo)外(wai)(wai)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)，火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)產(chan)(chan)脂(zhi)量(liang)(liang)(liang)比(bi)(bi)(bi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)低(di)30%左右，且(qie)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)在(zai)(zai)(zai)(zai)采脂(zhi)割面(mian)(mian)溢出的(de)(de)(de)(de)(de)(de)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)脂(zhi)不(bu)易干涸，易于(yu)(yu)流(liu)出。因此(ci)(ci)，在(zai)(zai)(zai)(zai)營(ying)造(zao)(zao)高(gao)(gao)(gao)產(chan)(chan)脂(zhi)豐(feng)產(chan)(chan)林(lin)時，應(ying)(ying)以(yi)(yi)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)為主。火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)含脂(zhi)量(liang)(liang)(liang)小(xiao)于(yu)(yu)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)，但生(sheng)(sheng)(sheng)(sheng)(sheng)產(chan)(chan)紙漿材(cai)優(you)于(yu)(yu)濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)。在(zai)(zai)(zai)(zai)木材(cai)順紋抗壓(ya)強(qiang)度、抗壓(ya)彈性、抗彎(wan)強(qiang)度等(deng)方(fang)面(mian)(mian)，濕(shi)(shi)(shi)(shi)(shi)(shi)地(di)(di)(di)(di)(di)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)比(bi)(bi)(bi)火(huo)(huo)(huo)(huo)(huo)炬(ju)(ju)(ju)(ju)(ju)松(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)(song)較(jiao)大(da)(da)。