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阐述龙岩市百香果主要病虫害及其症状特征,主要病害由重到轻依次为病毒病,疫病,褐斑病,炭疽病,煤烟病,茎基腐病,灰霉病,立枯病等;主要虫害依次是蓟马,实蝇,蚜虫,介壳虫,地老虎,红头芫菁,红蜘蛛,蛴螬等,并提出相关预防措施建议. 相似文献
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Between June 1993 and June 1994, 112 farmers in the oil palm (Elaeis guineensis)-cassava (Manihot esclentus) belt of southeastern
Nigeria were interviewed to determine the status and agroforestry potential of Dacryodes edulis. Between 50% and 100% of respondents
in different states within the belt owned D. edulis trees. On average, a farmer owned 9.3 trees, the largest number being
16, by farmers in Imo State. Twenty percent of farmers in the system rated D. edulis their best farm tree. It was present
in all the farm niches: homegardens (51.4%), tree crop plots (20.7%) food crop plots (11.4%), secondary forest/fallow (14.2%)
and virgin forest (2.5%). The tree is planted primarily for home consumption and sale to generate cash. At the current densities,
on-farm D. edulis trees generally did not decrease yield of companion crops or trees. Except for ring weeding around the stem,
D. edulis trees received little or no management attention. More than 50% of the trees produced 33 to 50 kg of fruit tree−1 annually. This is valued at US $0.4 to 0.8 kg−1. Farmers were willing to plant more D. edulis trees provided trees with traits such as less height for easy harvesting of
fruits, larger fruit, more fruits, sweeter fruits and year round production of fruits were available. Possible agroforestry
technologies into which D. edulis may fit include live fences, scattered trees in food crop fields, shade trees in tree crop
plots and contour bund or hedgerow planting. Research is required to determine best tree accessions, canopy management strategies,
optimum tree population and improved methods on post- harvest handling of fruits.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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美国可食松P inus edu lis是自美国近两年引进的一种常绿针叶灌木树种.对其1年生播种苗进行了全年的生长观测、生物量测定以及形态特点的研究,并以本地树种油松P inus tabu laef orm is 1年生播种苗作为对比,将可食松1年生苗的生长划分为4个时期(出苗期,幼嫩期,速生期和苗木硬化期).结果表明:可食松1年生苗高生长速生期全年仅1次,地径速生期则出现2次;可食松苗地上部分粗壮矮小、初生叶繁多,地下部分具深根性特点.同时对该树种抗逆性进行了初步分析. 相似文献
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在花年毛竹纯林进行1a覆盖-1a套种竹荪轮作等经营模式试验,研究毛竹林覆盖后套种竹荪轮作模式经济效益和生态修复作用。结果表明:(1)1 a覆盖-1 a套种竹荪轮作模式的2 a净收入达到18.0万元/hm2,投入产出比达到1∶3.29,分别是传统单一经营模式、1 a覆盖-1 a自然培育经营模式的19.6倍和1.6倍。(2)毛竹林覆盖后套种竹荪轮作模式在高碳氮比(C/N)有机物覆盖的清理、林地土壤改良、林地地力培育等生态修复效果明显优于1 a覆盖-1 a自然培育经营模式,有效防止竹林地因覆盖而引发竹林衰退。毛竹林覆盖与套种竹荪轮作模式是毛竹林可持续性发展的经营模式,可作为毛竹林覆盖的配套经营措施在生产上推广应用。 相似文献
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黄甜竹笋用林丰产栽培研究 总被引:10,自引:0,他引:10
通过黄甜竹笋用林集约经营 ,促进早出春笋和高产培育。于秋冬季黄甜竹“孕笋期”采用竹林地灌溉 ,施“孕笋肥”促进其春笋孕育 ,并进行林地覆盖砻糠、稻草等增温、保温 ,促使林地地温稳定、持续达 14℃以上 ,可使黄甜竹春笋提前 2 0~4 5d出笋 ,且早期笋市场热销价高 ,产值翻番 ,其经济效益十分明显。翌年 5、6月份黄甜竹“发鞭期”施用“壮鞭肥” ,以深翻、深层施肥 (深度达表土层下≥ 30cm)可复壮竹林 ,达到黄甜竹林丰产培育的目标 相似文献
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对从红松林下新鲜子实体上分离纯化得到的两株外生菌根菌WSJ-1和WSJ-3进行ITS序列分析,确定其分别为赭丝膜菌(Cortinarius russus)和美味牛肝菌(Boletus edulis)。采用打孔注菌法,将两株外生菌根菌分别与东北红豆杉幼苗共同培养,研究其对东北红豆杉幼苗生长的影响。结果表明:赭丝膜菌与美味牛肝菌均可与红豆杉幼苗形成菌根,菌根侵染率分别为46.7%和35.0%;接种赭丝膜菌与美味牛肝菌后,均能显著提高东北红豆杉幼苗的鲜重、干重、苗高和地径的性状(P<0.05),其中赭丝膜菌效果优于美味牛肝菌。 相似文献