How Much Seed and Fertilizer per Mu of Corn? High-Yield Variety Recommendations

Corn seed is the propagule capable of growing into a mature corn plant; it is formed from the ovule after pollination and fertilization. So do you know how much corn seed is needed per mu of land? Which high-yield varieties are there? How much fertilizer should be applied? According to Uncle Li, a corn grower in Xinyang, Henan, planting corn uses about 4 jin of seed per mu, which is enough. Normally, if single-seed sowing is used, it is about 40 jin per hectare, give or take no more than 5 jin. This depends on the size of the seed grains. Double-seed sowing is 80 jin. The normal chemical fertilizer application rate, if topdressing is used, is 6-8 bags of 15-15-15 sulfur-based fertilizer, depending on the plot.

Which high-yield corn seed varieties are there?

I. Recommended high-yield corn varieties for the Huang-Huai-Hai region

1. Zhengdan 958 corn: suitable for planting on plots with medium or higher fertility in the Huang-Huai-Hai summer corn region.

2. Jundan 20 corn: suitable for summer sowing in Henan, Shandong, central and southern Hebei, Shaanxi, Anhui, Jiangsu, and the Yuncheng summer sowing area of Shanxi, as well as areas of Inner Mongolia with an active accumulated temperature of 3000°C or more at ≥10°C.

3. Longping 206 corn: suitable for summer sowing in Anhui, the Huaibei area of Jiangsu, and Henan (excluding the Kaifeng, Shangqiu, and Zhoukou areas), and Shandong (use with caution in areas with high incidence of corn smut).

4. Jinhai No. 5 corn: this variety is suitable for summer sowing in Henan, Hebei, Shandong, Shaanxi, Jiangsu, Anhui, and Yuncheng in Shanxi; use with caution in areas with high incidence of leaf diseases and smut.

5. Zhongke No. 11 corn: suitable for planting in the summer corn regions of Hebei, Henan, Shandong, Shaanxi, northern Anhui, northern Jiangsu, and Yuncheng in Shanxi.

6. Zhongdan 909 corn: suitable for summer sowing in Henan, Shandong (except Binzhou), the Guanzhong irrigation district of Shaanxi, Yuncheng in Shanxi, northern Jiangsu, and northern Anhui (except Huaibei City). Use with caution in areas with high incidence of corn smut.

7. Denghai 605 corn: suitable for summer sowing in Shandong, Henan, central and southern Hebei, northern Anhui, and the Yuncheng area of Shanxi, as well as suitable areas of the Inner Mongolia Autonomous Region, Shaanxi Province, and Zhejiang Province; use with caution in areas with severe outbreaks of brown spot and southern rust.

8. Weike 702 corn: suitable for spring sowing in the late-maturing area of Jilin, the mid-late maturing area of Shanxi, the Tongliao and Chifeng areas of Inner Mongolia, the Yan'an area of Shaanxi, and Tianjin; for summer sowing in Henan, the Baoding and southward areas of Hebei, Shandong, the Guanzhong irrigation district of Shaanxi, northern Jiangsu, and northern Anhui; and for spring sowing in Gansu, Ningxia, Xinjiang, Yulin in Shaanxi, and western Inner Mongolia.

9. Suyu 29 corn: suitable for spring and summer sowing in Jiangsu and Anhui, and spring sowing in Jiangxi and Fujian Provinces.

10. Shengrui 999 corn: suitable for summer sowing in the Baoding and southward areas of Hebei, Henan, Shandong, the Guanzhong irrigation district of Shaanxi, northern Jiangsu, northern Anhui, and southern Shanxi. Use with caution in areas with high incidence of rough dwarf disease and corn smut.

11. Yuyu 30 corn: suitable for summer sowing in Beijing, Tianjin, Hebei, Henan, Shandong, the Guanzhong irrigation district of Shaanxi, the Yuncheng area of Shanxi, northern Jiangsu, and northern Anhui. Use with caution in areas with high incidence of corn smut and rough dwarf disease.

II. Recommended high-yield corn varieties for the southern region

1. Dongdan 80 corn: suitable for planting in the late-maturing areas of Liaoning and Jilin, Beijing, Tianjin, northern Hebei, and spring sowing in Shanxi, as well as in the flatland, hilly, and low-mountain areas of Yunnan, Guizhou, Sichuan, Chongqing, Hunan, Hubei, and Guangxi; pay attention to controlling underground pests.

2. Yayu 889 corn: suitable for planting in medium-to-high fertility soil in Guiyang City, Zunyi City, Anshun City, Tongren Prefecture, Bijie Prefecture, Liupanshui City, and Qianxinan Prefecture of Guizhou Province; and for planting in medium and higher fertility plots in the 800-1700 m altitude corn production areas of Yunnan Province, as well as in the 1800-2200 m altitude spring corn production areas of the central and northern parts.

3. Chengdan 30 corn: suitable for planting in the flatland, hilly, and low-mountain areas of Sichuan Province; it can be intercropped or relay-cropped with wheat and vetch, or grown as a sole crop.

4. Zhongdan 808 corn: suitable for spring sowing in Sichuan, Yunnan, and Hunan; pay attention to preventing lodging.

5. Quanyu No. 9 corn: suitable for spring sowing in the flatland, hilly, and low-mountain areas of Chongqing, Hunan, Sichuan (except Ya'an), Guizhou (except Tongren), and the Hanzhong area of Shaanxi.

6. Suyu 30 corn: suitable for spring and summer sowing in Jiangsu and spring sowing in southern Anhui, Jiangxi, Fujian, Guangdong, and Zhejiang. Use with caution in areas with high incidence of stalk rot and dwarf mosaic disease.

7. Rongyu 1210 corn: suitable for spring sowing in the flatland, hilly, and low-mountain areas of Sichuan, Chongqing, Yunnan, Guizhou, Hubei, Hunan, Guangxi, and the Hanzhong area of Shaanxi.

8. Guidan 162 corn: suitable for planting throughout Guangxi.

9. Yunrui 999 corn: suitable for the cool highland mountainous areas of Yunnan Province above 1900 m altitude. Use with caution in areas with high incidence of gray leaf spot and banded leaf and sheath blight.

10. Suke Huanuo 2008 corn: suitable for planting as a fresh-eating waxy corn variety in southern Jiangsu, southern Anhui, Shanghai, Zhejiang, Jiangxi, Fujian, Guangdong, Guangxi, and Hainan. Use with caution in areas with severe outbreaks of stalk rot and dwarf mosaic disease.

III. Recommended high-yield corn varieties for the northern region

1. Deyu 919 corn: suitable for planting in the mid-late maturing corn area of Jilin Province.

2. Nonghua 101 corn: suitable for spring sowing in Beijing, Tianjin, northern Hebei, the mid-late maturing area of Shanxi, the mid-late maturing area of Liaoning, the late-maturing area of Jilin, the Chifeng area of Inner Mongolia, and the Yan'an area of Shaanxi; and for summer sowing in Shandong, Henan (excluding Zhumadian), central and southern Hebei, the Guanzhong irrigation district of Shaanxi, northern Anhui, and the Yuncheng area of Shanxi.

3. Jingke 968 corn: suitable for planting in Beijing, Tianjin, the mid-late maturing area of Shanxi, Chifeng and Tongliao in Inner Mongolia, the mid-late maturing area of Liaoning (except Dandong), the mid-late maturing area of Jilin, and the spring sowing areas of Yan'an in Shaanxi and Hebei.

4. Demeiya No. 1 corn: suitable for planting in the lower limit of the third accumulated temperature zone and the upper limit of the fourth accumulated temperature zone of Heilongjiang, areas of the Inner Mongolia Autonomous Region with an active accumulated temperature of 2200°C or more at ≥10°C, and the early-maturing area of the Yanbian region of Jilin Province.

5. KWS2564 corn: suitable for planting in the original SC704 corn planting area of Xinjiang and in plots in Jiuquan, Lanzhou, Wuwei, Pingliang, and other places in Gansu Province where corn dwarf mosaic disease and head smut do not occur; for single cropping in the Yellow River irrigation district of the central Ningxia drought belt, requiring an effective accumulated temperature of 2650°C or more at ≥10°C.

6. Dongdan 6531 corn: suitable for planting in corn areas within Liaoning Province with an active accumulated temperature of 2800°C or more at ≥10°C.

7. Xiangyu 998 corn: suitable for planting in the mid-late maturing corn area of Jilin Province.

8. Yu Silage 23 corn: suitable for planting as a special silage corn variety in the spring sowing areas of Beijing, Wuqing in Tianjin, northern Hebei (excluding Zhangjiakou), eastern Liaoning, central and southern Jilin, and the first accumulated temperature zone of Heilongjiang. Pay attention to controlling head smut and preventing lodging.

9. Suiyu 23 corn: suitable for planting in the second accumulated temperature zone of Heilongjiang Province.

10. Huanong 887 corn: suitable for spring sowing in the eastern mountainous area of Liaoning, the mid-maturing area of Jilin, the first accumulated temperature zone of Heilongjiang, and the mid-maturing area of eastern Inner Mongolia.

How much fertilizer should be applied to one mu of corn land?

1. During the growth process, corn needs to absorb large amounts of nutrient elements from the soil, among which nitrogen and potassium are required in the largest amounts. Generally, for every 100 kg of corn grain produced per mu, it is necessary to absorb 2.5 kg of pure nitrogen, 1.2 kg of phosphorus pentoxide, and 2.0 kg of potassium oxide. The ratio of nitrogen, phosphorus, and potassium is 1:0.48:0.8. The fertilizer requirement increases as the yield increases. Generally, the whole growth period of corn requires 10-16 kg of pure nitrogen, 3-5 kg of phosphorus pentoxide, and 5-8 kg of potassium oxide. Medium and trace elements such as zinc, boron, and manganese should be used according to the soil nutrient supply situation, supplementing deficiencies in a targeted manner.

2. In potassium-rich areas, the amount of potassium applied can be appropriately reduced. Corn is relatively sensitive to zinc, so zinc sulfate (0.1-0.3%) or other zinc-containing foliar fertilizers can be sprayed on the leaves at the jointing stage. Corn needs less fertilizer before jointing, the most from jointing to the large flare stage, and then gradually less afterward. Based on this pattern, the number and amount of topdressing should be reasonably adjusted. Topdressing is generally carried out twice, and can be done 10 days after jointing and 10-15 days before tasseling at the large flare stage, with less first and more later (maintaining a ratio of 2:3). For plots using one-time topdressing, it can be applied at the early large flare stage.