共查询到19条相似文献，搜索用时 609 毫秒
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赤红壤表土育苗施石灰后施Ｐ、Ｚｎ、Ｂ对巨桉苗生长的影响＊仲崇禄关键词巨桉石灰施肥苗木对巨桉（ＥｕｃａｌｙｐｔｕｓｇｒａｎｄｉｓＨｉｌｅｘＭａｉｄｅｎ）苗营养研究国内外有些报道［１～５］，但未见有关对巨桉施石灰调整土壤酸度后再施肥的报道。热带地区的赤红... 相似文献
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桉树(Eucalyptus)是我国南方广泛栽培的速生用材树种之一,虽有一套成功的造林经验,但对桉树的营养需求研究尚少。所以,对广为种植的桉树进行苗期矿质营养研究,对培育壮苗和幼林的合理施肥都有一定的意义。本试验选用水培法探讨适于桉苗生长的营养配方,在此基础上进行溶液浓度及pH值对桉苗生长影响的试验,以选出最佳的营养液配方,适宜的浓度和pH值,为进一步研究桉树矿质营养打下基础。 相似文献
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为探讨施肥方式、坡位及肥料含量对速生巨尾桉生长量的影响,确定速生巨尾桉最佳施肥方案,以巨尾桉为试验对象,按不施肥、施基肥、施二次肥,采用上坡、中坡、下坡3因素3水平进行随机区组试验,调查各施肥方式下巨尾桉生长情况.结果 表明:与不施肥相比,在下坡施二次肥时,巨尾桉的生长量最高,较不施肥分别增加33.33％、62.61％... 相似文献
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施肥处理对巨尾桉人工林材性的影响 总被引：1，自引：0，他引：1
通过对不同施肥处理巨尾桉人工林材性的比较分析,结果表明：巨尾桉人工林木材密度、硬度、横弯强度、抗劈力均表现为初期施肥＞初期施肥 中期施复合肥＞初期施肥 中期施磷酸二铵；仅初期施肥巨尾桉人工林木材品质最有利于作为胶合板原料,其次为初期施肥 中期施复合肥。三种不同施肥处理除初期施肥与初期施肥 中期施磷酸二铵间巨尾桉人工林木材抗劈力差异极显著或显著、初期施肥与初期施肥 中期施复合肥间巨尾桉人工林木材径向抗劈力差异显著外,其余两者间其它指标均差异不显著。 相似文献
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本研究选择整地、施肥、密度三个主要栽培措施作试验因素，进行正交试验。结果分析表明：整地、施肥、密度对巨尾桉生长的影响程度依次为密度＞整地＞施肥。密度是巨尾桉纸浆材丰产的关键措施；在较好的立地上，巨尾桉纸浆材丰产林的栽培可采用块状整地方式，规格为５０×５０×５０ｃｍ；每穴施基肥：滤泥２．５ｋｇ＋复合肥０．６６５ｋｇ；造林密度为１６６５株／ｈｍ２。 相似文献
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吴光华 《中南林业调查规划》2010,29(1):61-63
通过巨尾桉一年生树高生长规律和施肥期的试验研究结果表明:巨尾桉树高生长呈"驼峰型",第一次高峰期的生长量大于第二次;不同的肥料和施肥期对巨尾桉树高生长影响显著;正确选择肥料和施肥期是巨尾桉速生丰产的关键措施。 相似文献
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闽南山地巨尾桉施肥试验研究 总被引：2，自引：0，他引：2
闽南山地巨尾桉施肥试验研究结果表明:不同施肥处理对巨尾桉胸径、树高、单株材积、蓄积量的生长造成极显著的差异,其中,P肥对巨尾桉生长极端重要,N肥次之,最佳施肥配方是N200P150K0(kg·hm-2),即每1hm2林地施N肥200kg、P肥150kg,不施K肥。 相似文献
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用土壤养分系统研究法评价杨树人工林土壤养分状况 总被引：2，自引：0，他引：2
YUChang-bing CHENFang LUOZhi-jian CHENWei-wen 《林业研究》2004,15(4):298-300
A study was conducted to evaluate the soil nutrient status of poplar plantation by Soil Nutrient Systematic Approach(SNSA) in Jianghan Plain, Hubei Province, China. Soil physiochemical properties were analyzed in laboratory through collection soil samples of study site. Ten treatments of application different fertilizers were designed such as CK, optimum treatment (N, P,K, Zn), -N(P, K, Zn), -P(N, K, Zn), -K(N, P, Zn), Mg(N, P, K, Zn, Mg), -Zn (N,P,K), 2P(N, 2P, K, Zn), 2K(N, P, 2K, Zn), and 2N 2P 2K(2N, 2P, 2K, Zn) for field experiment to test the effect on tree height, diameter (DBH) growth, and dry weight of poplar.The results showed that there was no significant difference in tree heights between treatments with different fertilizers, diameter growth of poplar trees in treatments of lack of N and Zn was significantly slower than that of trees in optimum treatment, and dry weight of poplar dropped significantly for treatment of CK as well as treatments without application N and Zn. It is concluded that N and Zn were main limiting factor for poplar growth. Results from laboratory analysis and field experiment were uniform perfectly, which proved that SNSA was reliable in evaluating soil nutrient status of poplar plantation. 相似文献
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腐殖质赤红壤上施磷、锌和硼对巨桉苗的影响 总被引：3，自引：0，他引：3
在温室中以６个营养处理对腐殖质赤红壤上巨桉苗进行施肥试验，结果表明：苗高、地径和生物量在施肥处理与对照处理间存在着极显著差异；除单施锌（Ｚｎ）处理的根系生物量、单施硼（Ｂ）处理的茎枝生物量和根系生物量外，各处理的指标都大于对照处理的指标，并与对照有显著差异；各含磷（Ｐ）元素处理的高径比都小于对照，相反，单施Ｚｎ或Ｂ处理的高径比都大于对照；以苗高、地径、地上生物量、地下生物量和总生物量为基础，选出各施肥处理的优劣顺序为Ｐ＋Ｚｎ＞Ｐ＋Ｚｎ＋Ｂ＞Ｐ＞Ｂ＞Ｚｎ＞ＣＫ。同时，对６个处理的苗木各部分生物量间的分配关系进行了分析。 相似文献
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为了解桢楠(Phoebe zhennan)幼苗的生长对模拟氮沉降的响应,以1年生桢楠幼苗为材料,设置5个氮水平CK(0)、N1(5.7 g·m-2·a-1)、N2(11.4 g·m-2·a-1)、N3(19.0 g·m-2·a-1)和N4(38.0 g·m-2·a-1),对不同施氮水平下幼苗的株高、地径、生物量和根系指标进行研究。结果表明,不同施氮处理均促进了株高、地径和叶面积的增长,株高增长率、地径增长率和叶面积均以N3处理最高,分别为CK的3.93、1.51和1.33倍;不同施氮处理均提高了幼苗的生物量,各施氮处理下整株鲜重分别较CK提高了22.15%、31.53%、96.45%和45.82%,以N3处理最高;随着施氮量的增加,幼苗的总根长、根直径、根表面积、根体积和根尖数均先升高后降低;隶属函数分析结果显示N3处理的桢楠幼苗质量最佳,说明适度氮沉降能促进幼苗生长,但更高水平的氮沉降可能会产生一定抑制作用。 相似文献
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Growth characteristics and nutrient utilization rate of Nyssa aquatica L. seedlings grown in pots containing flooded or well-drained soil were compared in a greenhouse study. For most of the growing season, relative height and diameter growth rates, and biomass accumulation rates were greater for seedlings in flooded soil than for seedlings in well-drained soil. The concentration of Fe in the roots of seedlings in flooded soil was almost tenfold greater than that of seedlings in well-drained soil. However, flooding had no effect on foliar Fe concentrations. The flooding treatment resulted in decreased concentrations of N in all component parts and increased concentrations of P in the roots and stem, but it had no effect on foliar P concentrations. In response to flooding, foliar K concentrations decreased, whereas the concentration of K in the roots increased. Flooding had no effect on the K concentration of the stem. Seedlings in flooded soil produced more total biomass per milligram of nutrient absorbed than seedlings in well-drained soil, suggesting that N. aquatica seedlings are more efficient at producing biomass and height growth under hydric conditions than under mesic conditions. 相似文献
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为了给尾巨桉幼林的施肥提供依据,以肥料类型为试验因素,采用随机区组设计对其进行培育,研究不同肥料类型对尾巨桉幼林生物量、养分分配及养分利用率的影响.结果表明:在等N、P、K施入量的条件下,地径、树高生长、生物量分配以处理Ⅲ最佳.整体排序为处理Ⅲ>处理Ⅱ>处理Ⅰ>CK.国产的有机无机复合肥对幼林尾巨桉树高、地径、生物量效果最佳,进口复合肥次之,传统复混肥最差.国产的有机无机复合肥与进口复合肥的养分利用效率无显著差异.从尾巨桉的生长以及生产成本考虑,推荐使用国产的有机无机复合肥施肥. 相似文献
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Seedlings of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and western red cedar (Thuja plicata J. Donn ex D. Don) were grown at high (250 mg l(-1)) and low (20 mg l(-1)) nitrogen (N) supply for a year. Before the second growing season, half of the seedlings in each nutrient treatment were allocated to the other treatment. Half of the seedlings in each nutrient treatment then had all growing points removed. Biomass and N, phosphorus (P) and potassium (K) concentrations of old and new shoots and roots were measured three times in the second year to test the interaction of current-year and previous-year nutrient supply on biomass and nutrient allocation in these two species with different growth habits. Pruned seedlings served as controls. Unpruned seedlings of both species increased in height throughout the second growing season, except for Douglas-fir in the N250 --> N20 treatment. Repeated pruning did not prevent new shoot growth, but resulted in a 12 to 52% reduction in biomass of new shoots and new and old roots. Seedlings receiving a low N supply in the first growing season were more severely affected by pruning than seedings receiving a high N supply. Growth was reduced more by pruning in western red cedar than in Douglas-fir. Concentrations of N, P and K were higher in pruned seedlings than in unpruned seedlings. Although dry weights of all plant parts in all treatments increased throughout the second growing season, some retranslocation of N, P and K was observed from old shoots of both species in the N250 --> N20 and N20 --> N20 treatments after August. Quantities of N, P and K retranslocated were greatest in seedlings grown the previous year in the high-N treatment. 相似文献
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为了解不同施肥处理对普陀樟(Cinnamomum japonicum var.Chenii)、全缘冬青(Ilex integra Thunb.)、红楠(Machilus thunbergii Sieb.et Zucc)3种海岛树种苗木生长及造林效果的影响,设置了7个不同的施肥处理,即(1)N(对照),(2)N+P,(3)N+2P、(4)N+K、(5)N+2K、(6)N+1P+1K、(7)N+2P+2K,于2011年5月至2012年1月观测苗高和地径,并测定植物各部分的生物量。结果表明:3种苗木不同施肥处理下,通过测算苗木质量指数QI可知,在N+1K施肥组合下,全缘冬青的苗木质量最好,而红楠在N+2P+2K的施肥组合下苗木质量最高,普陀樟在N+1P+1K的施肥组合下,苗木质量要好于其他处理。 相似文献
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实验研究接种聚丛球霉菌(Glomuse aggrregattum)、幼套球霉菌(Glomuse etunicatum)、摩西球霉菌(Glomuse mossea)后对降香黄檀幼苗生殖生长以及营养吸收利用的影响,结果显示:1)3个菌根菌侵染效果较好,且降香黄檀幼苗对3种菌种有较强的依赖性。2)其中接种聚丛球霉菌的苗高、地茎、生物量、叶绿素含量及对营养元素N,P的吸收利用优于其他2个菌种,并与CK差异达显著水平;其苗高、地茎高于CK 44%和78%,生物量、叶绿素含量分别是CK的3.6,1.9倍,根部、茎部及叶部含N量是CK的1.47,2.03,1.34倍,而根部、茎部及叶部含P量是CK的1.53,1.47,2.09倍。 相似文献
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施肥对10个墨西哥柏种源幼苗生长的影响 总被引：2，自引：0，他引：2
对温室条件下的10个墨西哥柏种源幼苗进行施肥试验,并测定了其苗高、地径、叶片叶绿素含量和叶片N、P、K浓度。试验设3个处理水平:正常温室养护管理,为对照(CK);施用复合肥N、P、K质量比为1∶1∶1,总养分≥45%(T1);施用复合肥N、P、K质量比为4∶1∶1,总养分≥48%(T2);施用尿素(N 46%)(T3)。结果表明,10个墨西哥柏种源对不同施肥处理的吸收效率各不相同;施肥能显著促进墨西哥柏苗木的生长,不同施肥比例对生长指标的影响各不相同,其中T2>T3>T1;T1、T2处理水平很好的促进了叶绿素的积累,其中T1>T2,而T3对墨西哥柏叶绿素影响不显著;处理T2下的10个种源叶片N、P、K元素浓度与CK差异最显著,其次是T1、T3。 相似文献