How to prevent high temperature of kidney beans in summer, and how many degrees of low temperature c

Measures to overcome high temperature obstacles and increase pod setting rates. Application of growth regulators: when high temperature and little rain, spray 1 mg kg concentration of anti-drop solution, or 15 mg kg concentration of naphthalene acetic acid solution, or 15 mg kg concentration of indole acetic acid solution at the flowering stage, which has the effect of reducing pod drop and improving fruit setting rate.

Wide row cultivation: the furrow width (even ditch) is increased to meters, and the creeping kidney beans are planted in two rows, and the furrow direction is basically the same as the local wind direction, which is conducive to ventilation and heat dissipation and reduces the field temperature.

Strengthen fertilizer and water management: spraying a concentration of 1 kg of vitamin solution during the whole growth period or pre-growth period can increase the number of buds, the number of flowers, the pod setting rate, and the weight of a single pod, and the growth period has an early trend. Mulching the furrow (especially kidney beans sown in June and early July) reduces temperature and moisturizes the bed.

In case of high temperature and drought during flowering and podding, irrigation should be carried out in time to keep the soil moist (about 60% relative humidity), avoid and alleviate the dual effects of high temperature and drought on pod-setting, and improve the fruit setting rate.

Kidney bean high temperature barrier:

Kidney bean growth and development and high temperature disorders. The effect of high temperature on flower bud differentiation showed an approximate number of flower bud differentiation at the same accumulated temperature. Therefore, the higher temperature in summer can meet the accumulated temperature requirements of flower bud differentiation in a short time, and the number of days of flower bud development is shortened, but the quality of flower buds is poor. Under high temperature, the early stage of kidney bean flower bud development is faster, and the number of flower buds is also more, but with the prolongation of high temperature time, the development rate slows down, and stops developing around the stigma formation stage, and then even if it develops, the pollen mother cell formation is incomplete or the overall development of flower buds is weakened, and more falls off or disappears.

The same trend was observed in the high nights, when flower bud differentiation began to decrease. During the flower bud differentiation stage, the pod length was shortened and the number of pods per plant decreased, resulting in a decrease in yield.

If the kidney beans planted in the greenhouse are too high, they can be rescued with the following foliar fertilizers: 1. Phytodynamic 2003 1000 times foliar spray15% natural brassinin EC 6000-10000 times foliar spray, 3, Kebao plant eugenics 1500-3000 times (transplanted crops, pesticide damage and fertilizer damage, frost damage, waterlogging damage, strong roots and seedlings, control Wang use 1500 times) foliar spray, 4, Green Wind 95 600 times foliar spray, 5, Jinbang No. 1 plant health biosine 500 times foliar spray, 6, Lvheng Tianbao high-efficiency plant yield enhancer 1500 times foliar spray, 7, new natural amino acid foliar fertilizer 300 500 times foliar spray, 8. 1500 times foliar spray of Qiyin plant gene activator, 9. 300 times foliar spray of Xinnongbao multi-element compound foliar fertilizer

4% sodium renitrate phenol aqueous agent 1500 3000 times foliar spray, 11, green Yangkang Golden Rice Bowl containing amino acid foliar fertilizer 300 500 times foliar spray, 12, Enbilai high-efficiency liquid fertilizer 1500 times foliar spray136% gibberella, inethyl, brassinin wettable powder (Bihu) 10000 12000 times foliar spray, 14, Mingyue seaweed broad-spectrum foliar fertilizer (containing alginic acid organic water-soluble fertilizer) 800 1500 times foliar spray for top dressing. Thank you.

<> hail. Kidney beans can tolerate low temperature in the same growth stage will be different, in the seedling stage Lingheng can withstand 10 °C low temperature, if it is lower than 5 °C will be subject to frost damage, flowering period below 15 °C will appear a large number of flower drop phenomenon, when the temperature is too low, you can surround a net next to the plant, can block the wind.

Kidney beans can tolerate different low temperatures in different growth stages, in the seedling stage can withstand 10 °C low temperature, if it is lower than 5 °C will be frost damage, open hail flowering period below 15 °C will appear Daling measure flowering phenomenon, when the temperature is too low, you can put a net next to the planting ruler imitation plant, can block the wind.

<> kidney beans can tolerate different low temperatures in different growth stages, in the seedling stage can withstand 10 low temperatures, if less than 5 will be frost damage, flowering period below 15 will be out and rent a large number of flowers, when the temperature is too low, you can plant a net next to the plant, can block the wind.

1. Temperature control. Kidney beans do not like high temperatures, and higher temperatures often cause kidney beans to grow and fall into flowers. The temperature in the shed is high in spring, and if you do not pay attention to strengthening ventilation, the flowering and fruit setting rate of kidney beans will not be very high, and even if you sit down, flower and pod fall will also occur.

Therefore, if you want to achieve high yield of kidney beans, it is very important to control the temperature during the flowering period. In general, the most suitable temperature for kidney bean flowering is 20-24, above 24 when the fruit setting rate decreases, and above 28, there will be serious flower drop and pod fall.

2. Water control. Watering during the flowering period will cause kidney beans to fall flowers and pods, so watering must be prohibited during the flowering period. In order to prevent the soil in the shed from being too dry during the kidney bean flowering period, you can slip a little water in the planting ditch before flowering to ensure that the soil is not too dry during the kidney bean flowering period.

3. Boron supplementation. Boron fertilizer deficiency is also one of the important reasons for kidney bean flower and pod dropping, therefore, kidney beans must be supplemented with boron fertilizer in the early stage of flowering. Borax 600 times or Solubor 1200-1500 times can be sprayed, which can significantly improve the flowering and fruit setting rate and avoid flower and pod dropping.

It should be emphasized that the boron deficiency in some vegetable fields is mostly caused by the obstruction of the plant's root fertilizer absorption ability due to the excessive drought of the soil, so it is necessary to pay attention to keeping the soil dry and too wet during the kidney bean flowering period.

Fourth, drug control. Kidney beans should avoid using drugs containing pyrimemycosamine, mancozeb, anthrax fomei, and ethyldicarb, and copper preparations should also be halved. Kidney bean is sensitive to pesticides at the flowering stage and is often prone to pesticide damage, especially pyrimelam.

Therefore, when using kidney beans, you must not choose the medicine containing the above ingredients, spraying this kind of agent will not only cause the leaves to turn yellow, but also cause flowers and pods in serious cases. In addition, when using medicine, it should also be noted that the concentration ratio of liquid medicine should be scientific and reasonable, and spraying should be stopped during the general flowering period to avoid pesticide damage, resulting in the occurrence of kidney bean falling flowers and pods.