共查询到20条相似文献，搜索用时 171 毫秒
1.
2.
3.
4.
对云南省林业科学院培育出的早实核桃新品系进行采穗圃快速营建技术的研究，通过种植密度，施肥，修剪，浇水4因素3水平的正交试验得出，快速营建早实新品系核桃采穗圃的方法为：选择具有深厚，疏松，湿润土壤的园地建圃，每666．6m^2种植嫁接苗330株，第2年开始，每年每株施厩肥10kg,复合肥0．2kg，旱季浇水8次以上；当新梢长5－8cm及时摘去生长点以促进当年2次分枝，此法，建圃第2年便可开始采穗，到第4年每666．6m^2所采接穗累计可供62000株核桃嫁接用，成本0．15元／个，4年后每年产接穗可供36000株以上核桃嫁接用，成本0．06元／个以下，采穗圃接穗的嫁接成活率达81．3％，该技术亦适用于其他核桃良种采穗圃建设。 相似文献
5.
为指导陕西省西咸新区设施大樱桃高产栽培技术，总结出一套设施大樱桃高产栽培关键技术，主要包括品种选择及定植、及时扣棚、温湿度管理、花果管理、合理施肥、整形修剪、病虫害防治等关键技术，也可为其它类似地区大樱桃设施栽培提供参考。 相似文献
6.
7.
利用青石山区梯田堰边栽植1～2a生核桃实生苗，株距4～5m，行距不等，每公顷平均375株。缓苗后进行良种嫁接。主要品种有元丰、香铃、鲁光、阿九等嫁接第2年结果，第3年有一定产量。每666．7m^2核桃产量3a生为33．5k，5a生为915kg，9a生为218．25kg，12a生为273．25kg。堰边良种核桃的综合经济效益分别为对照的1．5～4．9倍阐述了主要优质丰产栽培技术，包括实生苗建园与幼树嫁接良种、合理整形修剪、肥水管理与合理间作、适期采收、坚果处理及病虫害防治等。 相似文献
8.
9.
10.
板栗山地早实丰产技术研究 总被引：2，自引：0，他引：2
经过9年山地培育试验，实现栗林栽培的早实生产，连续4年挂果，年平均产量达3028.5kg/hm^2，最高达4947kg/hm^2；初步筛选出九家种、玉早、尖顶油栗、青扎四个适宜本地栽种的丰产优质良种；密度试验结果表明，本地良种初植密度为40－70株／667m^2，控制林分郁闭度0.7-0.75间，有利于丰产称产；适宜的建植方式，可加快建园进程，合理的树体修剪、林农间作、林地施肥及病虫害防治等幼林培育技术综合措施，是实现山地栗林早实丰产的有效途径。 相似文献
11.
12.
叙述了葡萄避雨栽培简易大棚的结构和双十字V形整枝技术；采用石灰氮处理并在1月中、下旬的覆膜技术，打破葡萄的休眠期，促使提早萌芽结果，同时通过棚内光照、温度、湿度的调节，结合施肥，整形修剪等配套技术，达到葡萄的优质、稳产、高产。 相似文献
13.
14.
15.
During 1996 and 1997, populations of aphids and whiteflies and their parasites were studied in plastic greenhouses under a chemical control program and in those free of pesticides. In the greenhouses free of pesticides, the parasite A. colemani destroyed 14.7?% of the aphids. B. tabaci had no effect on the cucumbers during the spring cultivation. However, it attacked the autumn cultivation. The parasite E. mundus killed 30?% of these nymphs. The parasite A. colemani parasitized up to 10?% of aphids on tomato plants in greenhouses free of chemical pesticides. The parasite E. mundus killed 15.7?% of whitefly nymphs. In greenhouses under a chemical pesticides program, aphids and whiteflies were found on the plants at the end of the plantation season, after the pesticide spraying had stopped. Although the pest population was low, the parasite A. colemani parasitized 8?% of the aphid population. Whiteflies were not found on tomato plants in greenhouses under extensive pesticides use. 相似文献
16.
鲁甸县板栗低产成因分析及增产增效途径 总被引：3，自引：1，他引：2
在对鲁甸县板栗资源及发展情况进行调查的基础上，立足资源现状，对板栗产业中存在的品种混杂、干旱缺水、栗园建设不健全、管理粗放等低产成因进行分析，提出更换良种、改善水肥条件、加强病虫害防治、适时修剪等增产增效措施． 相似文献
17.
18.
针对近年来花椒种植业发展迅速,但椒农普遍缺乏科学的管理知识,导致树势衰弱,提前老化,产量低,病虫害发生普遍。总结提出了花椒树的土肥管理,整形修剪及病虫害综合防治技术,为发展花椒种植业提供理论依据。 相似文献
19.
Farmers in the Eastern Province of Zambia are faced with problems common to other parts of the tropics: increased pressure to expand food production leading to accelerated forest clearing, decrease in traditional fallow periods, increased soil erosion, and reductions in soil fertility. Of special concern are shortages of labor during their growing season, a shortage of staple foods during January through March, pest (termite) problems, and seasonal fires. Alleycropping appears able to solve some of the farmers' problems. Both on-farm and experiment station trials were initiated to screen potential agroforestry species. Perennial pigeonpea, Cajanus cajan (L.) Millsp., a species indigenous to the Province, showed particular promise. Cultivars grew over 3 m tall and produced up to 4.8 tons/ha dry matter (in 7 months after pruning) for green manure. Farmers reacted favorably to their experience with the on-farm trials. Ease of establishment and production of food (green pod and grain) make perennial pigeonpea a special agroforestry option in the Province, deserving additional research. 相似文献
20.
Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae) is an important pest in cucumber greenhouses in Izmir, Western Turkey. This study was carried out during the spring and autumn seasons of 1999 and 2000 in two adjacent cucumber greenhouses, each 1,000 m2 in size. Population densities of adult L. huidobrensis in insecticide-treated and non-treated greenhouses were compared by using yellow sticky traps. Ten traps were placed in the non-treated greenhouse and ten traps in the insecticide-treated greenhouse. Yellow sticky traps were changed weekly and the number of flies counted in order to compare the two greenhouses. In addition to monitoring the leaf miner population, in each greenhouse 100 plants were checked and the ratio of infested plants, the ratio of infested leaves per plant and the number of mines per leaf were recorded weekly. The population density of the leaf miner was almost the same in both insecticide-treated and non-treated greenhouses. Thus, it was concluded that using yellow sticky traps will be healthier and more cost effective than using pesticides. Furthermore using pesticides is risky for the environment and the use of yellow sticky traps can easily reduce the number of pesticide applications. If yellow sticky traps are used in the greenhouse in a completely isolated environment and the appropriate insecticide is used when it is necessary, this will provide successful and integrated management against L. huidobrensis. 相似文献