1. Temperature
Loofahs originate in high-temperature and rainy tropics, preferring higher temperatures for thermophilic heat-resistant vegetables. It grows vigorously at high temperatures, has large stems and leaves, and grows fast and large. The suitable monthly average temperature for growth is 18-24°C. The flowering result requires a higher temperature. The average optimum temperature is 26-30°C. Above 30 °C can also grow and develop normally. Loofah seedlings have a certain ability to withstand low temperatures and can grow normally at about 18°C. The temperature is slow when the temperature is lower than 15°C. When the temperature is lower than 10°C, the growth is inhibited. If the temperature is lower than 5°C, the growth is poor. If the temperature is lower than 0°C, it will be killed by freezing. The seeds germinated fastest at 30-35°C, but the young shoots were weak and the most suitable germination temperature was 28°C. The germination was slow when the temperature was below 20°C.
2. Moisture
Loofah has a well-developed root system and strong anti-drought ability. However, in the case of excessive drought, the fruits are easy to grow and the fibers increase and the quality deteriorates. Loofahs are also the most moisture-tolerant melons of vegetables. Even if they are rained or flooded for a certain period of time during the rainy season, they can normally bloom and result. Ordinary loofah is more resistant to moisture than angular loofah.
3. Light
Luffa is a short-day plant, but most cultivars have less stringent lighting requirements. However, in the short-day conditions, female flowers occur earlier and more, and flowering and fruiting are good. Under long day conditions female flowers occur later and less frequently. However, different species have different responses to the length of sunshine. Generally, loofahs need shorter sunshine and slightly higher temperatures before vines are pumped to facilitate the growth of stems and leaves and the differentiation of female flowers. Flowering and fruit setting requires higher temperatures and longer sunshine or stronger light intensity to promote nutrition. Growing and flowering fruit set. The loofah also has a certain shade-tolerance, and can grow in the shade. However, it is generally good for high yields and good quality on sunny and sunny conditions. Continuous rainy weather or excessive shading can seriously affect the growth of plants and the formation of female flowers, resulting in falling buds. Loofah cultivation in open areas in the north and other regions, when 7-9 months of loofah growth robust, more fruit set, the quality is also good. If cultivated in protected areas in winter, due to low sunshine and large temperature difference, the female flowers of gourd gourd are more differentiated. It is necessary to strengthen the management of fertilizer and water, promote fruit setting, and carry out necessary fruit thinning and fruit thinning.
4. Soil and Fertilizer
Loofahs have less stringent soil and fertilizer requirements and are widely adaptable. However, it is best to grow in fertile loam where the soil is deep, contains many organic substances, and has good drainage. The requirements for fertilizers are dominated by nitrogen fertilizers. The combination of phosphorus and potash fertilizers is beneficial to high yields and high quality. A suitable soil pH is pH 6.0-6.5.
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