我撰写的“绿色金子——四棱豆”一文,在1995年《农家顾问》第1期上发表后,本人收到了全国各地读者来信近千封,现就信中询问的几个共同问题作如下答复: ●关于四棱豆的适应范围 这是来信中问得最多的问题。四棱豆原产亚热带地区,属高温短日照作物,只有在相对高温和短日照条件下才能正常开花结荚。我国原有的四棱豆品种,在5、6月份由于积温 I wrote a book entitled “Green Gold - Four-Beans,” which was published in the first issue of “Farm Advisers” in 1995. I received nearly one thousand letters from readers across the country and I now share a few common questions asked in the letter Here are my replies: ● The scope of adaptation for Pyrifolia It is the most frequently asked question in the letter. Tetrastigma native to the subtropical region, is a short-day high-temperature crops, only under the conditions of relatively high temperature and short sunlight can flowering pod. China’s original four-sided bean varieties, in May and June due to accumulated temperature