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为了探明施肥对马尾松人工林生长的影响,在桂西北干热河谷地区选择马尾松人工幼林建立固定样地,采用生物有机无机复混肥不同肥施量进行连续5年4个处理(即A 1.0 kg/株、B1.5 kg/株、C2.0 kg/株,以及CK不施肥)的肥效试验。当林分生长至9年生时,其生长量显示如下规律:(1)胸径生长量为C(11.40 cm)>B(11.10 cm)>A(10.87 cm)>CK(10.80 cm);(2)树高生长量为C(9.87 m)>B(9.43 m)>A(9.23 m)>CK(9.20 m);(3)林分蓄积量为C(79.35 m3/hm2)>B(72.45 m3/hm2)>A(68.34 m3/hm2)>CK(67.33 m3/hm2)。从总体上看,马尾松人工幼林生长量显示出施肥比不施肥提高1.5%～17.9%,其中,施肥量2.0 kg/株处理对林木生长的效果显著。
In order to find out the effect of fertilization on the growth of Pinus massoniana plantation, a fixed sample of Pinus massoniana plantation was selected in the dry-hot valley of northwestern Gui-xi Province. Four years of treatment were carried out for five years in succession using bio-organic-inorganic compound fertilizer A 1.0 kg / plant, B1.5 kg / plant, C2.0 kg / plant, and CK without fertilization). The results showed that when the stand was grown to 9 years old, its growth was as follows: (1) The DBH growth was C (11.40 cm)> B (11.10 cm)> A (10.87 cm)> CK (10.80 cm) The growth of tree height was C (9.87 m)> B (9.43 m)> A (9.23 m)> CK (9.20 m). (3) The stock volume of stand was C (79.35 m3 / hm2) hm2)> A (68.34 m3 / hm2)> CK (67.33 m3 / hm2). Overall, the growth of Pinus massoniana young plantations showed that the fertilization increased 1.5% -17.9% compared with no fertilization, of which, the effect of applying 2.0 kg / plant fertilizer on the growth of trees was significant.