Question

short note on propagation structure​

Answer 1

Step-by-step explanation:

The structures which facilitate propagation of plants are called propagation structures. Propagation structures are required for propagating plants by seed, cuttings and grafting. Propagation structures are of two types; i) The first type a structure with temperature control and ample light, such as a green house, modified quonset house, or hot bed-where seeds can be germinated or cuttings are rooted or tissues culture micro-plants are rooted and acclimatized and the ii) The unit is structure into which the younger, tender plants can be moved for hardening, preparatory to transplanting out-of-doors. Cold frames, low polyethylene tunnels or sun tunnels covered by saran cloth and lath-houses are useful for this purpose.

Greenhouses

Greenhouse has been used long back by horticulturists as a mean of forcing rapid growth of plants and extending the growing season particularly in colder areas. These are being used for whole sale production and propagation of floricultural plants, nursery stock of fruit crops and vegetable crops.

Answer 2

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propagation structure :

There should be adequate provision for modern propagation structures like mist

chamber, poly houses, net houses etc. These structures provide optimum conditionsrequired for seed germination, rooting of cuttings and hardening of plants beforetransplanting them in the field.