When is sweet potato planted and harvested?

Sweet potatoes are usually planted in the middle and late April to the middle and early May. The sweet potato harvest period is from late September to 10.

Growth habit

The growth period of spring potato is 160-200 days, and that of summer potato is about 1 10- 120 days. According to the growth characteristics of Chiquan in the wild and its relationship with climate conditions, it can be roughly divided into three growth periods:

1, prophase (from seedling planting to pot sealing). 60-70 days for spring potato and 40 days for summer potato. At this stage, the stems and leaves grow slowly and the roots develop rapidly, mainly in the period of long fiber roots.

2. Mid-term (from pot sealing to the peak of stem and leaf growth). Spring potato lasts about 50 days, and summer potato lasts about 30 days. At this stage, the root tuber expands slowly, and the stems and leaves grow rapidly, which is a period of mainly growing stems and leaves.

3. Late stage (stem and leaf decline to harvest). Spring potato is after late August, and summer potato is after early September. This period is the main period of root enlargement.

Extended data:

Botanical history

J.B. Edmund and others believe that sweet potato originated in Mexico and tropical America, from Colombia, Ecuador to Peru. A.von Humboldt quoted Gomorrah as saying: When Columbus visited the Queen of Spain for the first time, he presented the sweet potato brought back from the New World to the Queen.

/kloc-At the beginning of the 6th century, sweet potatoes were widely planted in Spain. Spanish sailors brought sweet potatoes to Manila and Moluccas in the Philippines, and then spread them all over Asia. Sweet potato was introduced into China through various channels at the end of 16, and it was recorded in Shu Min, Agricultural Administration Complete Book in Ming Dynasty, Zheng Minquan Book in Qing Dynasty and Fuzhou Official Records.

Sweet potato is called sweet potato because it is "imported". Chen Shiyuan's Biography of Golden Potato in Qing Dynasty quoted Records of Minhou: "According to sweet potato, it was planted by overseas Luzon. During the Wanli period of the Ming Dynasty, Marco Long, a Fujian native, traded his land to get rattan seedlings and planted them in China. It is worthy of drought and flood protection in Fujian. When Jin Taishou ordered Longzi to try planting, he gained a lot and could shoot half a grain.

Naturally, it is planted all over the ground. "He also said," It is called sweet potato because it comes from Fan's country. It is planted in Gong Jin, so it is also called golden potato. "It is also reported that Chen Zhenlong's sixth generation Sun Zhenyuan and his son Chen Yun spread sweet potatoes in Yinzhou (Ningbo, Zhejiang), Jiaozhou, Qingzhou (Weifang, Qingdao, Shandong) and Yuzhou (Zhuxian Town, Henan) successively, and gradually spread all over Zhejiang in about 20 years after Qingganlong.

The above historical facts prove that the sweet potato line was introduced into China, Fujian and Guangdong from Nanyang at the end of 16, and then spread to the Yangtze River, Yellow River basin and Taiwan Province Province. Today, China's sweet potato planting area and total output rank first in the world.

References:

Sweet Potato (Convolvulaceae) _ Baidu Encyclopedia