1. Momordica charantia fruit is spindle-shaped or cylindrical, with many tumors and wrinkles, and is 10-20cm long. When mature, it is orange-yellow, and the top three petals are cracked. Most seeds are rectangular, with red aril, 3 small teeth at both ends, engraved on both sides, length 1.5-2 cm, width 1- 1.5 cm. The flowering and fruiting period can be-10 month.

2. Cucumber fruit is oblong or cylindrical, with a length of 10-30(-50) cm. When mature, it is yellow-green, with rough surface and spiny protrusions, extremely sparse and nearly smooth. The seeds are small, narrowly ovate, white, borderless, with both ends subacute, and about 5- 10 mm long. Summer flower and fruit period.

Second, the distribution range is different.

1. Momordica charantia is native to East India and widely cultivated in tropical to temperate regions of the world. China is widely cultivated in the north and south.

2. Cucumber is widely cultivated in all parts of China, and now it is also widely cultivated in temperate and tropical regions.

Third, the demand for temperature is different.

1, Momordica charantia is native to the tropics and requires high temperature, heat resistance and cold resistance. But after long-term cultivation and selection, it has strong adaptability and can adapt to 10-35℃. According to the experimental data, the optimum temperature of bitter gourd seed germination is 30-35℃. Although the seed coat of bitter gourd is thick, it is soaked in warm water leaves at 40-50℃ for 4-6 hours and germinates at a suitable temperature. Germination began after 48 hours, and more than 70% germinated after 60 hours.

Germination is slow below 20℃ and difficult below 13℃. It germinates rapidly and robustly at about 25℃, and after 15-20 days, it can grow into 4-5 true leaves. The optimum temperature for bitter gourd to blossom and bear fruit is about 25℃, and in the range of 14-25℃, the higher the temperature, the more favorable it is for the growth and development of bitter gourd plants, with early fruiting and high yield.

2. Cucumber likes warmth and is not cold-resistant. The suitable temperature for growth is 10-32℃. Generally, it grows best at 25-32℃ in the daytime and 15- 18℃ at night. The optimum ground temperature is 20-25℃, and the lowest is about 65438 05℃. The optimum temperature difference between day and night is 10- 15℃. Cucumber has poor photosynthesis at high temperature of 35℃, and it is blocked at high temperature of 45℃. It freezes to death at low temperature of -2-0℃, and can withstand low temperature of 3℃ if exercising at low temperature.

Baidu Encyclopedia-Bitter Melon (Cucurbitaceae Bitter Melon)

Baidu Encyclopedia-Cucumber (Cucurbitaceae)