What is the average yield per mu of Yanshu 25? Spring sweet potato 6000 jin, summer sweet potato 3500 jin

AbstractYanshu 25 spring sweet potato is planted at about 3300 plants per mu, with an average yield per mu of about 6000 jin, while summer sweet potato is planted at about 3500-4000 plants per mu, with an average yield per mu of about 3500 jin. Yanshu 25 is currently planted on a large scale in Shandong, Henan, Hebei and Liaoning and other regions.

I. Introduction to Yanshu 25

1. Yanshu 25 was bred by the Yantai Academy of Agricultural Sciences through hybridization technology. In March 2012, it passed national identification and Shandong provincial approval. It is a new edible-type variety with good quality, high yield and good disease resistance. In 2011, Yanshu 25 won second place in fresh tuber yield and first place in eating quality in the National Sweet Potato Eating Quality Group Competition.

2. Yanshu 25 belongs to the fresh-eating type sweet potato. This variety of sweet potato has very good sprouting ability, medium-long stems and vines, and many branches.

3. It tastes fragrant, glutinous, delicate and high in sweetness. It is best used for roasted sweet potatoes. It has low fiber content and is rich in carotene and vitamin C.

4. It has good disease resistance, resisting root rot and black spot disease, with moderate resistance to sweet potato wilt, moderate resistance to stem rot, and moderate resistance to stem nematode disease.

5. Through the national-level northern region regional trial, spring Yanshu 25 is planted at 3300 plants per mu, with a yield per mu of about 6000 jin, while summer Yanshu 25 is planted at 3500-4000 plants per mu, with an average yield per mu of about 3500 jin.

6. It has currently been planted and promoted on a large scale in Shandong, Henan, Hebei, Liaoning and other provinces.

II. Classification of Sweet Potato Varieties

The diversified and specialized format of sweet potato varieties has initially taken shape. According to the use of sweet potato products, they can be divided into: roasting type, fresh-eating type, processing type, health-care type, leaf-use type, etc.

1. Roasting-type varieties

Sushu No. 8, Red Banana, virus-free Beijing 553, Yi 138, Jingbian, Xinong 431, Hebei Zaohong, Yanshu 18, Jishu 22, Longshu No. 9, Golden Sweet Potato, Xushu 55-2, Xushu 55-1, etc.

2. Fresh-eating type varieties

Jishu 6—8, Jishu 4, Yushu 10, Jishu No. 22, Zhe 1257 (Jinyu), Sushu 8, Xinong 431, Beijing 138, Xinxiang, Xianghuang No. 1, Xu 55-1, 36-1, L87, 55-7, etc.

3. High-starch processing type varieties

Shangshu 19, Xushu 24 (Xu 9912), Jishu No. 21, Jishu 98, virus-free Xushu 18, Xinnong No. 1, Jingshu No. 2, Qinshu No. 1, Fuxushu 6, Xushu 25, Xu 18, Yi 190, Wuse Shu, Yi 306, etc.

4. Health-care type varieties

Jingliu, Shanchuan Zi, Ji 37, American Black, American Black Star No. 2, Japanese Chuanshanzi, Hebei 351, Longshu No. 3, Guaizi, Xuzi No. 2, Huaxin Wang, American 9408, etc.

5. Stem-and-leaf vegetable-use type varieties

Yushu No. 1, Shu 830, Fushu 7-6, Yushu Wang, etc.

III. Introduction to Common Planting Varieties

1. Sushu No. 8 (yellow skin)

(1) One of the new sweet potato varieties, it has three major characteristics: “extra high yield, extra early maturity, extra strong disease resistance”, and was bred and cultivated from red-skinned Sushu No. 8.

(2) Its vine stems are short, about 70-80cm in length. The tubers it produces grow together in a cluster, and the color is withered yellow and yellow-brown.

(3) The average yield per mu of spring sweet potato is 15000 jin, and that of summer sweet potato is more than 7000 jin, with a sugar content of 13.4% and a dry matter rate of 23%. The skin is smooth and the quality is good. It can be eaten cooked or raw.

2. Virus-free Beijing 553

(1) This kind of sweet potato forms tubers early and grows quickly. The top has purple leaves and the leaves are green, and the roots and stems are thick and strong, green with purple.

(2) The vine length is 2.53m, with many branches and a long tuber shape. The skin color is yellow and the flesh color is apricot yellow.

(3) It has good sprouting ability and a high survival rate. The fresh tuber yield per mu is 6000 jin, and the slicing dry rate is 25%.

(4) It is drought-tolerant and fertilizer-tolerant, and highly resistant to black spot and stem nematode disease.

(5) It can be eaten raw or cooked, and steaming or roasting is also very good. It is often used to make processed sweet potato preserves.