高节竹梢枯病发生规律及防治试验   总被引：3，自引：1，他引：3  

胡国良  俞彩珠  楼君芳  赵银贵  周平山  詹国华 《中国森林病虫》2005,24(5):38-41

在掌握高节竹梢枯病Arenrinium phaeospermurn发生规律的基础上，对10种杀菌剂进行室内药效测定，选出的70％甲基托布津、50％多菌灵、80％402乳剂、40％异稻瘟净、20％粉锈宁等5种杀菌剂对暗孢节菱孢菌有较强的抑菌作用。野外防治试验表明，采用综合治理措施，防治效果可达88．2％。  相似文献   

北美兰云杉全光喷雾下扦插影响因子研究     

孟鹏  李玉灵  宋晓东  尤国春 《河北林果研究》2007,22(3):237-241

试验通过采用5因素4水平正交试验法,选出了适合北美兰云杉嫩枝扦插的最佳处理组合:草炭 珍珠岩基质 100 mg/L自配生根剂 2 a母树穗条。通过方差分析发现穗条母树年龄、基质种类对扦插生根率有显著影响,其中穗条母树年龄为2 a时,平均生根率达到了77.5%。基质种类对生根的影响是通过基质质地、通透性、保水力、地温、肥力等多因素共同作用的。综合看,草炭 珍珠岩基质是北美兰云杉扦插最为理想的基质,河沙基质最差。  相似文献   

苦竹熟笋护色研究     

黄勇  郑维鹏  郑蓉  谢一青  陆新邦  郑锦辉 《福建林业科技》2005,32(1):73-74,99

通过对护色效果的观察,确定护色液的成分和浓度为0 03%Z+2%T,最佳pH值为5,且笋体在护色液里浸泡时间为1h,这对于提高苦竹笋的加工品质和销售价值具有重要的意义。  相似文献   

Plantation future of bamboo in China     

LIZhao-hua MikioKOBAYASHI 《林业研究》2004,15(3):233-242

In the past, utilization of bamboo resources in China has been traditionally dominated by direct consumption of local farmers as minor forest products with weak linkage with market. In recent years, the over-supply of grains and rapid degradation of agricultural environment call for alternative crops that can be developed through integrating the environmental plantation with the market demands. Closely associated with forestry and agriculture, bamboo is able to deal with the new challenges which China‘s agriculture is facing. Of 534 documented bamboo species in China, 153 species produce edibleshoots and of which 56 species are recommended for agricultural plantation; 139 species provide timbers and of which 58 species recommended; 116 species can be splited as good strips for weaving and of which 22 species recommended; 88 species are considered as garden bamboos and of which 34 species recommended; 45 species are able to produce paper pulp and of which 18 species recommended.  相似文献   

台湾相思截干促萌短轮伐期的育林技术研究     

陈沾水 《西部林业科学》2006,35(2):105-107

1984年于厦门市翔安区内厝镇前垵村,采用不同造林密度、施用不同种类有机肥、不同直径截干促萌等处理进行试验。结果表明,对台湾相思截干促萌短轮伐期的育林,以造林密度1.5 m×1.5 m,施用垃圾土及林木地径为12~16 cm截干为最佳组合。  相似文献   

雷竹留笋养竹期鼠害的发生规律和防治技术     

李培民  黄宗兴  史如金  俞如良  徐德云 《浙江林业科技》2003,23(2):33-34

通过对黑线姬鼠和大家鼠生活习性的观察，了解其在雷竹园为害雷笋的症状和时期，并对其进行防啃试验，结果表明，烟壳套笋尖的防啃效果最好，防效达100%；尼龙薄膜包笋的效果其次，防效为97.9%；涂苦楝树果防效为63.8%。  相似文献   

论菜竹笋丰产基地建设   总被引：1，自引：0，他引：1  

何林  陈苏贞 《浙江林业科技》1997,17(2):71-73

论述丽水地区发展菜竹笋丰产基地的条件，菜竹笋基地标准、建设和培育的主要措施。  相似文献   

我国笋竹产业如何应对加入WTO     

雷泽兴  吴起明 《福建林业科技》2002,29(Z1):63-66

阐述了我国笋竹产业的现状,分析了我国笋竹产业加入WTO面临的机遇与挑战,指出了我国笋竹业应对加入WTO的具体对策。  相似文献   

Configuration and development of root systems of cuttings and seedlings of Eucalyptus globulus     

Sasse  Jo  Sands  Roger 《New Forests》1997,14(2):85-105

Stem cuttings of Eucalyptus globulus are used within tree improvement programs and for mass deployment. To be successful, cuttings must perform as well or better than seedlings. The root systems of cuttings are fundamentally different from those of seedlings. If these differences influence growth, the differences and their consequences must be identified and the propagation system manipulated to improve performance of the propagules.Cuttings are only a viable alternative to seedlings as planting stock if the method of propagation does not affect their growth and development adversely. Full-sibling cuttings and seedlings of Eucalyptus globulus were compared under controlled environmental conditions to minimise extraneous sources of variation, and to establish whether changes in growth or development were induced by propagation. On three occasions over a period of eight weeks root-collar diameter, shoot height, leaf and stem weight, shoot/root ratios and root system morphology were measured on cuttings and seedlings. Seedlings were taller than cuttings throughout the experiment, but both plant types had similar height growth rates. Diameter growth rates were lower in cuttings than seedlings, and there were differences in both height and diameter growth rates between families. Root system configuration differed between the plant types. Seedlings had strongly gravitropic tap-roots, with two types of primary roots from which secondary roots emerged. Cuttings had no tap roots, and the main structural components of their root systems were adventitious roots formed during propagation. Cuttings did not develop further structural roots during the experiment, whereas seedlings continued to develop primary roots. Individual primary roots of cuttings were longer and had larger mid-point diameters than those of seedlings, but the total length of primary roots was greater in seedlings. Seedlings also had a greater number and total length of secondary roots. Shoot/root ratios, calculated from a range of functional measures, were higher in cuttings than seedlings.  相似文献   

Effect of shoot size and phenological variation of host plants on the spatial patterns of cynipid galls     

Masato Ito  Naoki Hijii 《Journal of Forest Research》2001,6(3):147-151

The effects of shoot size and differences in budburst phenology ofQuercus serrata trees on the spatial patterns of galls were investigated for two cynipid species: the sexual generation ofAndricus moriokae and the agamic generation ofAphelonyx glanduliferae. There were marked differences in budburst phenology, but these did not affect the gall density on the tree. The galls of both cynipids showed a contagious distribution in their respective trees, but different abundance patterns under high gall density. The mean number of galls ofA. glanduliferae over a shoot size range was positively correlated with shoot size. More galls ofA. moriokae appeared on larger shoots on trees on which many buds had started growing before oviposition by the agamic adults. In the case of a tree on which a few buds had burst by the time of oviposition, the mean numbers ofA. moriokae galls on shoots of particular size ranges depended on the frequency of shoots in the size class. These results suggest that, although these cynipids prefer to attack larger shoots within a host tree, they may exhibit plasticity in their preference in response to changes in budburst phenology of the host plant relative to the time of oviposition.  相似文献