共查询到17条相似文献,搜索用时 156 毫秒
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根据广西沿海地区豇豆生长发育气候环境条件和病虫发生为害特点,提出通过创造有利于豇豆正常生长发育而不利于病虫发生为害的栽培环境条件,有效地改善豇豆生育状况,使植株健壮生长,增强自身抗逆性,减少、控制病虫滋生、蔓延和为害,控制豇豆产品农药残留不超标,实现豇豆健身栽培。 相似文献
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热带作物田间生长环境信息包括风速、风向、光照强度、空气湿度、土壤湿度、CO2浓度、降雨量等数据,这些环境信息对作物的生长环境调控和作物田间科学管理非常重要。本研究围绕热带瓜果哈密瓜田间环境信息采集这一问题,研究哈密瓜田间生产环境智能传感与检测关键技术。采用tiny210硬件核心板,利用安卓系统和Java语言进行编程,集成空气温湿度传感器、光照一体传感器、土壤湿度传感器、风向传感器、风速传感器,建立热带瓜果哈密瓜田间生产环境智能传感与检测系统,主要解决哈密瓜田间生长环境信息动态采集和数据管理,为田间生长环境调控提供参考数据。 相似文献
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采用组织块分离法从采后发病芒果果肉中分离病原菌,通过形态学观察、r DNA-ITS序列和系统发育树分析对其进行鉴定,并初步研究其生物学特性。结果表明:从发病芒果中分离到的病菌T0408鉴定为Colletotrichum asianum Prihastuti,L.CaiK.D.Hyde。该菌菌丝生长的适宜温度为20~30℃、适宜pH值为5~8;环境湿度在75%~98%范围内,湿度越大,菌丝生长速度越快,在3 000 lx日光灯的光照强度下连续光照有利于菌丝的生长和产孢;孢子萌发的适宜温度为25~30℃、适宜pH值为6~8,环境湿度为75%~98%,湿度越大、在3 000 lx日光灯的光照强度下连续光照有利于孢子的萌发。 相似文献
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现代科技的飞速发展,使得计算机模拟林木的生长成为可能,3-PG模型充分考虑了林龄、温度、盐分、空气湿度、土壤肥力和含水量、霜冻天数等因子对光合作用的影响,通过一系列方程模拟碳量平衡、水量平衡、盐分平衡和太阳辐射变化,以此来模拟林分的动态生长过程。3-PG模型应用于橡胶树栽培具备了各种软、硬件方面的条件,期望能在可行性评估、规划、定产、水分、养分、病虫害防治、割胶、绩效等方面,实现精准栽培。 相似文献
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水稻防虫网育秧和机械插秧技术在水稻生产上应用前景广阔,总结了水稻防虫网育秧的优点,并简要介绍了防虫网育秧和机插秧技术的操作方法,提出了相关高产配套栽培技术,以期为生产推广提供借鉴。 相似文献
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《Crop Protection》1988,7(3):186-189
The effect of mixed cropping of cowpeas with maize on light intensity in the cowpea canopy and on population density of Megalurothrips sjostedti (Trybom) was investigated in the field and in cages. Significantly less (P< 0 · 05) light was intercepted by the cowpea canopy in the cowpea/maize mixed crop than in the cowpea crop alone. The population density and activity of M. sjostedti were significantly less in the mixed crop than in the single crop. There were significant correlations between light interception and differences in the population density of nymphs (r=0 · 79), adults (r=0 · 84) and the overall activity (r=0 · 93) of M. sjostedti. In a screenhouse choice test, M. sjostedti preferred unshaded cowpea plants to shaded ones. The results suggested that reduced light intensity in the cowpea/maize mixture contributes to the relative scarcity of M. sjostedti in the mixture. 相似文献
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A new trial to determine the dyeing properties of cotton and silk fabrics with a black cowpea seed coat as crop waste was investigated. The natural dye anthocyanins were extracted from a black cowpea seed coat in an aqueous solution and used to dye silk and cotton. The optimal conditions for colorant extraction were an aqueous solution of a dried seed coat of black cowpea in a 1:10 liquor ratio at 70 °C for 4 hours with pH of 4. The best dye-uptake of silk and cotton fabric were obtained when the pH was 3.5 and 3.0 respectively, the temperature was 80 °C for 1 hour and the liquor ratio of black cowpea was 1:20. Different colors as dusky brown, brown, faint yellow, light green, reddish brown, cyan and green could be obtained using a various kind of mordants. The depth and brightness of color tones were affected by different dyeing and mordanting pH conditions. The colors of the fabrics were examined using a computer color matching system in terms of the K/S values and CIELAB color-difference values. The dyeing was evaluated using standard light, wash and heat fastness tests. Good wash and heat fastness were obtained but the poor light fastness indicated the need for improvement to fulfill the requirement for textile applications. 相似文献
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宽幅带播对大穗型冬小麦冠层特征及产量的影响 总被引:4,自引:0,他引:4
为了解宽幅带播在小麦种植上的应用效果,在大田条件下,以兰考矮早八为材料,研究了宽幅带播种植对大穗型冬小麦冠层特征及产量的影响.结果表明,与常规条播比较,宽幅带播的小麦群体叶面积指数、冠层光截获量和相对湿度较高,而冠层温度较低,穗数显著增加,产量提高0.47%~13.70%.宽幅带播下随着行距增大,叶面积指数、光截获量和湿度降低,而冠层温度升高,穗数和穗粒数减少,千粒重增加,最终产量降低.宽幅带播下15 cm行距可作为大穗型冬小麦品种的适宜行距配置. 相似文献
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以适合寒地种植不同生育期的水稻品种(系)为试验材料,在苗期设置不同光质和光照度的LED灯光照射处理,研究光对寒地水稻秧苗生长的影响,以期为寒地在冬季实现室内培育水稻提供参考。结果表明,两种光质处理对水稻秧苗的影响相似;不同水稻品种对光的反应有所差异,但提高光照度后水稻秧苗有叶龄进程加快、根数增多、茎基变宽、地上部干质量和根干质量增加、壮苗指数提高的趋势,适当增加光照度有利于培育水稻壮苗。与对照相比,光照度1 700 lx左右时水稻秧苗素质较差,光照度3 500 lx左右时水稻秧苗素质相近,光照度5 300 lx左右时水稻秧苗素质显著提高。 相似文献