Method for tomato soilless cultivation with suspended trough

A method for tomato soilless cultivation with suspended trough, comprising four aspects:

• setting of a soilless cultivation substrate trough, preparation of soilless cultivation substrate, efficient and economical grafting and plant management;
• the soilless cultivation substrate trough comprises a rectangular substrate trough;
• drainage holes are provided on a bottom of the rectangular substrate trough and on a middle and upper portion of two walls of the rectangular substrate trough, a plurality of suspension bolts are provided on the two walls adjacent to a mouth of the rectangular substrate trough in parallel and side-by-side, the rectangular substrate trough is suspended by a plurality of side-by-side pulling ropes with a hook at a lower end;
• a plurality of horizontal fixing ropes are fixed in a middle of the plurality of side-by-side pulling ropes and the plurality of horizontal fixing ropes are parallel and equidistant to each other;
• a rotating rod is connected to an upper end of the plurality of side-by-side pulling ropes;
• and an integrated water and fertilizer pipeline is arranged above the rectangular substrate trough;
• the soilless cultivation substrate adopts a coir dust and soybean composite substrate, wherein the coir dust and soybean composite substrate is prepared from coir dust, soybeans, and pig manure according to a mass ratio of 5-6:
• 2-3:
• 2-3;
• the efficient and economical grafting comprises seedling raising, preparation of a scion, grafting and healing culture, and specific operations are as follows:
• 1) seedling raising:
• cultivating a scion seedling of tomato and a rootstock seedling;
• 2) preparation of the scion:
• cutting and removing an upper tip of the scion seedling, and after the scion seedling has grown two side buds, cutting the scion seedling off from a stem part to form the scion with two fruiting branches;
• 3) grafting:
• removing an upper tip of the rootstock, cutting a grafting incision, implanting the scion into the grafting incision of the rootstock and fixing the scion with a grafting clip to complete the grafting to form a grafted seedling;
• and
• 4) healing culture:
• placing the grafted seedling in an artificial climate room, controlling a condition that a temperature is at a range from 24° C. to 26° C., illumination is for 16 h / day, humidity is 75%, light intensity is 55 μmol / (m2 s) and a light ratio of red and blue is 2:
• 1, so as to promote wound healing and cultivate the grafted seedling strong;
• the plant management comprises planting, pruning and vine raising, flower and fruit management, and plant type maintenance, and specific operations are as follows:
• (1) planting:
• planting the grafted seedling in the rectangular substrate trough filled with the soilless cultivation substrate to ensure that the two fruiting branches of the grafted seedling branch off toward the rectangular substrate trough respectively;
• (2) pruning and vine raising:
• cutting off all side branches except the two fruiting branches after planting, and pulling the two fruiting branches toward the plurality of side-by-side pulling ropes on the two walls of the rectangular substrate trough, respectively;
• ensuring that main branches of the two fruiting branches grow along the plurality of side-by-side pulling ropes to form a “V” shape when vine raising, wherein an angle between the “V” shape and a vertical line of a horizontal plane is 30 degrees, so as to make good use of space and receive light;
• (3) flower and fruit management:
• retaining fruit at the main branch of each fruiting branch naturally during the flowering and fruiting period, wherein each ear of the fruit retains well-proportioned, pest-free, non-traumatic, and fruity robust fruit;
• (4) plant type maintenance:
• removing all side branches under the second or third inflorescence of each main branch of fruiting branches when budding and pruning, retaining 2 leaves on the side branches after the second or third inflorescence, and cutting top tip off;
• removing all side branches under each ear before the each ear is ripe for picking;
• removing old leaves on a sunny day and airy condition, and removing leaves under each ear during fruit enlargement period to ensure a good development of upper fruits.