四虎无码,天天碰天天干,爱爱AV无码爱爱,农村熟女88AV

造價通
更新時間:2025.06.14
葉菜型甘薯蔓尖產量構成分析(英文)

格式:pdf

大?。?span class="single-tag-height">219KB

頁數: 4頁

Total yields of vine tip of seven varieties of Leaf-vegetable sweetpotato during 2006-2007 were investigated; proportions of the weights of leaf, leaf stalk and stem in total vine tip yield and their changes among varieties and during topping stages were studied. The results showed that vine tip yields of sweetpotato were significantly different among either varieties or topping stages; leaf yield accounted for about 51% of total vine yield, and changes in leaf yield among topping stages were higher than that among varieties; while yields of leaf stalk and stem each accounted for 25% of total vine tip yield, their changes among varieties were higher than those among topping stages. These results revealed the yield composition of vine tip of Leaf-vegetable sweetpotato, which provided scientific references for breeding and cultivating new Leaf-vegetable sweetpotato variety and its industrialization.

假瘤蕨屬(水龍骨科)植物葉片附屬結構的生態(tài)意義

格式:pdf

大?。?span class="single-tag-height">301KB

頁數:

電鏡下觀察并研究了假瘤蕨屬植物的葉片附屬結構.報道了蠟質顆粒、片層、柔毛和鱗片.葉片附屬結構在數量及性質上的差別顯示出種類與環(huán)境的適應性不同.結果表明,假瘤蕨屬植物中土生的種類具有較多的蠟質顆粒、柔毛及鱗片,而附生的種類具有較多的顆粒及片層,這些葉片特征均與亞熱帶常綠闊葉林的生態(tài)環(huán)境相適應.

熱門知識

尖葉鹵蕨

精華知識

尖葉鹵蕨

最新知識

尖葉鹵蕨
點擊加載更多>>

相關問答

尖葉鹵蕨
點擊加載更多>>
專題概述
尖葉鹵蕨相關專題

分類檢索:

综合网999| 国产系列精品av| 日韩av在线小说| 精品一区二区三区日b| 欧美日韩色视频一区二区三区| 新亚洲天堂| 欧美一区二区三区综合| 久久合久久久久| 国内精品久久久久久影院8f| 宗合网| 日韩精品黄片com| 国产AV日韩AⅤ| 一区二区三区精华液9色| 在线的你懂的| 亚洲高清无码免费| 亚洲系列国产主播| 无套| 定兴县| 孕妇av| 99国产精品久久全免费| 国产欧美另类激情久久久| 中文字幕一区二区日韩精品| 在线观看 精品区一| 亚洲欧美日韩欧美| 荃湾区| 国产一区日韩二区欧美三区| 欧美巨大激情久久久| 久久激情视频| 午夜A一区| 国产传媒一区| 免费乱码人妻系列无码专区| 久久久久久精品免费免费999| 噜噜噜色| 欧美肏屄人妻爽爽综合视频| 七七影院| 久久久精品欧美一区二区白云视色| 激情精品| H精品视频| yyy6080色欲久久精品国产| 欧美日韩一区二区三区黄片| 久久91亚洲精品久久91综合|