Saturday, January 6, 2024
问题:我国切花菊周年生产主要是应用秋菊类品种进行调配,通常采用人工加光或遮光,调节气温及湿度使秋菊类品种提前开花,使()延迟开花,实现切花生产全年分批均衡上市的目的。...
Friday, March 22, 2024
Thursday, August 3, 2023
Thursday, April 4, 2024
问题:春菊的花芽分化对于日照长短反应不十分敏感,但对于()十分敏感。...
Thursday, February 1, 2024
问题:韭菜一般在第一年即进入生殖长阶段,顶芽发育成花芽,此后每年都可抽薹开花。...
Friday, March 24, 2023
问题:在番茄、茄子和辣椒三种作物中,番茄的根系最发达,吸收能力最短。...
Thursday, December 14, 2023
问题:目前我国切花菊品种主要是秋菊类,为在元息、春节供花,都需遂行人工补光以延迟开花期。对能源浪费较大、若能大量寻选()切花品种.就可减少人工补光的投资。...
Thursday, April 4, 2024
Friday, March 22, 2024
问题:豆类开花和结英时雨水多或土填湿皮大,容易造成落花()。...
Thursday, April 4, 2024
Saturday, January 6, 2024
问题:仙客来园艺品种极为丰富,按花型可分为:大花型、()、钟型(洛可可型)和皱边型四类。...
Friday, March 22, 2024
Thursday, December 14, 2023
问题:豆类开花和结英时雨水多或土填湿皮大,容易造成落花()。...
Thursday, April 4, 2024
问题:一品红不耐严寒,冬季低温常造成苞片泛滥,基部叶片变()脱落。...
Thursday, April 4, 2024
问题:甜瓜嫁接的适宜砧木有日本南瓜、()与西洋南瓜的杂交种、抗病性强的甜瓜品种和共砧等。...
Tuesday, August 22, 2023
问题:辣椒为中光性作物,光照时间长或短都能进行()分化和开花。...
Thursday, April 4, 2024
Thursday, February 1, 2024
Thursday, April 4, 2024
问题:葡萄的休眠对低温的要求非常严格,因此难以解除休眠。...
Thursday, February 1, 2024