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滇南苏铁繁育及回归种植建议
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作者 文云燕 吴晓玲 《耕作与栽培》 2023年第2期142-144,共3页
滇南苏铁为国家I级保护物种,种群数量稀少,人工繁育工作十分迫切。本试验通过采摘异交种、分种源保存、沙藏催芽、育苗等步骤对比了滇南苏铁野外种源和人工迁移种源的种子萌发性状。结果表明,滇南苏铁人工迁移庭院种植植株,结实率高(为... 滇南苏铁为国家I级保护物种,种群数量稀少,人工繁育工作十分迫切。本试验通过采摘异交种、分种源保存、沙藏催芽、育苗等步骤对比了滇南苏铁野外种源和人工迁移种源的种子萌发性状。结果表明,滇南苏铁人工迁移庭院种植植株,结实率高(为野外种源的2~5倍),千粒重大,起始萌发时间早,种子出芽率高(为野外种源的1.6倍)。基于本研究,建议在苏铁属植物繁育回归种群复壮时,首选采摘人工迁移种源,同时避免近交,以提高回归种群生存力。 展开更多
关键词 滇南苏铁 人工繁育 回归种植
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不同郁闭度和海拔高度对海南风吹楠叶片及生长指标的影响 被引量:1
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作者 王鑫 吴海霞 +2 位作者 符溶 杜尚嘉 陈国德 《热带生物学报》 2021年第4期481-490,共10页
为探究不同回归方式对海南风吹楠(Horsfieldia hainanensis Merr.)生长的影响,通过不同海拔(300、600、900 m)和不同郁闭度(0~0.2、0.3~0.5、0.6~0.8、>0.8)对3年生海南风吹楠进行回归种植,观测其生长指标、叶性和叶型的变化。结果显... 为探究不同回归方式对海南风吹楠(Horsfieldia hainanensis Merr.)生长的影响,通过不同海拔(300、600、900 m)和不同郁闭度(0~0.2、0.3~0.5、0.6~0.8、>0.8)对3年生海南风吹楠进行回归种植,观测其生长指标、叶性和叶型的变化。结果显示:(1)>0.8郁闭度回归种植能显著降低海南风吹楠株高、地径、叶长(LL)、叶宽(LB),对光合色素等指标无显著影响;(2)600 m海拔处理组能显著增加株高、叶片含水量(C_(LWC))、比叶面积(S_(LAM))、叶绿素b(Chl b),对叶型指标无显著性差异。试验结果表明,600 m海拔和低郁闭度(0.3~0.8)回归种植有益于3年生海南风吹楠的生长。 展开更多
关键词 回归种植 海南风吹楠 珍稀濒危植物 生长 叶片
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Regression Analysis of Nutrient Elements between Soil and Tobacco Leaves and Their Influences on Aroma Quality of Flue-cured Tobacco 被引量:1
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作者 Xueqin XU Xiaolan LI +2 位作者 Zhiyan CHEN Defen ZENG Aifei XU 《Agricultural Science & Technology》 CAS 2014年第3期493-498,共6页
This study aimed to analyze the relationship between nutrient elements K, Ca, Mg, Cu, Mn, Zn and Fe in tobacco-planting soils and tobacco leaves from six main tobacco-producing areas, and to investigate the influences... This study aimed to analyze the relationship between nutrient elements K, Ca, Mg, Cu, Mn, Zn and Fe in tobacco-planting soils and tobacco leaves from six main tobacco-producing areas, and to investigate the influences of these elements on chemical composition and aroma components in tobacco leaves. Results showed that there were certain relationship between contents of nutrient elements in tobacco-planting soils and contents of corresponding elements in tobacco leaves; various elements exhibited different influences on the aroma quality of flue-cured tobacco. Based on the actual situation of nutrient contents in soils from different tobaccoproducing areas, contents of various elements in tobacco leaves should be regulated by soil fertilization and foliar spraying, thereby improving the aroma quality of flue-cured tobacco. 展开更多
关键词 SOIL TOBACCO Nutrient elements Regression analysis Aroma quality
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The Impact of Land Fragmentation in the Qualitative and Quantitative Aspect of Seeds and Their Production
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作者 Bleza Teneqexhi Arjola Luci 《Chinese Business Review》 2017年第5期250-257,共8页
Due to the pedo-climate conditions in the region of Korca, this area is considered to be one of the most favorable regions for cultivating various kinds of plants such as cereals, vegetables, wood-trees, vineyards, et... Due to the pedo-climate conditions in the region of Korca, this area is considered to be one of the most favorable regions for cultivating various kinds of plants such as cereals, vegetables, wood-trees, vineyards, etc. All the factors such as rain, temperature, the impact of sunlight, and the pathological structure of the land, make this region one of the most productive and qualitative among the others. Changing the political systems in Albania during the last decades in Albania had its own impact even in the agricultural aspect. Shifting from communism into a modem, capitalist economy built a huge barrier for farmers in their way to intensifying the agricultural production. Dividing the land according to the law number 7,501, was accompanied by a severe fragmentation of the plot, reducing the degree of mechanization and chemical process. In this paper, the authors will try to analyze the effect of law fragmentation in the regional farmers working process in the region of Korea, and other municipalities such as Bilisht and Maliq, nearby Korea. There were randomly interviewed 150 farmers, from which 30 from the municipality of Bilisht, 22 from Korca municipality and 15 from Maliqi. From each farmer, these were the variables taken into consideration: Total land area, irrigated land, the number of plots, the area planted with wheat, corn, vegetables, fruit, vineyards, and forages. All the data that were gathered and translated into figures have indicated statistic elements such as the average value of each variable, deviation or standard deviation, coefficient of variation, correlation and regression. For instance in the municipality of Bilisht, it has been concluded that between the total variable area and number of plots, the related correlation value of the correlation coefficient is r = + 0.73 and the value of regression coefficient is R = 2.71. In this municipality, correlative links between the variable and the total area planted with wheat area, are of medium category, with a value of the correlation coefficient of r = + 0.52 and the regression coefficient is R = 0.89. Regarding the studies in the municipality of Maliq, it has been a correlation link between the weak variable category: in the surface of the irrigated area and the land planted with vegetables and corn, the value of the correlation coefficient is r = + 0.24 and the regression coefficient R = 2.11. In the municipality of Korea, among the variable of irrigated area and the surface of the land planted with vegetables, there is a weak correlative link with a value of the correlation coefficient r = + 0.17 and the regression coefficient R = 0.58. 展开更多
关键词 statistical processing correlation coefficient regression variable plant species
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