摘要
试验研究遮阳网覆盖逆境条件对烤烟产量与品质的影响结果表明 ,烤烟长时间覆盖遮阳网后田间地表日均温度降低 3 2℃ ,株间透光率减少 17 2 % ,行株间蒸发量分别降低 1 7mm和 1 0mm ,使烤烟现蕾、开花期推迟 ,根、茎、叶农艺性状变弱 ,产量下降 112 6 5kg/hm2 ,上中等烟比例降低 3 6 1% ,长期覆网经济效益降低 。
The influence of the adverse condition of shading -nets in flue-cured tobacco was studied. The result s show that the field climate changes remarkably under the shading- net cover. The average daily temperature decreases by 3.2℃. The penetratin g rate among plants reduces by 17.2%. The evaporations among rows and plants res pectively drop 1.7mm and 1.0mm. The climate change makes flue- cured tobacco delay in bud emergence and blossoming, and decrease its growth of roots, stems and leaves. The yield decreases to 1126.5kg/hm 2. The percentage o f the superior and medium tobacco reduces by 36.1%. Therefore, a long term of co vering is not suitable for flue-cured planting.
出处
《中国生态农业学报》
CAS
CSCD
2003年第4期152-154,共3页
Chinese Journal of Eco-Agriculture
基金
"九五"江西省烟叶科学研究所资助项目部分研究内容
