Standardized techniques of dry cultivation and sparse planting of Rice in Ningxia

Clean the pear orchard to scrape off the rough skin and warped skin, remove the cocoon pupae of pear heart borer, pear star caterpillar and other pests; clean up the withered branches, leaves and fruits to reduce the infection source of pear scab, brown spot, powdery mildew and other viruses; cut off the branches and stems of diseased leaves and eliminate the overwintering larvae of pear subcutaneous moth and pear stem wasp; the cleaning should be concentrated, buried or burned.

Irrigation and fertilization in the period from defoliation to freezing to improve the overwintering ability of pear trees; 10 days before flowering in spring, combined with tree age and tree potential, 0.5 kg urea was applied per plant to promote flowering and leaf expansion.

Deep turn the tree plate in early winter or early spring, turn the tree plate about 30 centimeters, eliminate beetle pests.

Reasonable pruning and thinning of dense branches, light pruning of backbone branches and weak branches, heavy cutting of strong branches; no pruning in the strong fruiting branch group, while retraction to the strong branch in the weak fruiting branch group; if the central stem is too strong, it can be cut short at 1 or 2 light and weak buds in front of the good bud belt; if the lower main branch is too weak, the strong or erect branch can be removed or retracted, or the strong branch can be replaced with a strong branch; the non-erect strong branch can be long and the weak branch can be thinned; the erect strong branch can be replaced by weak branch or twisted in early spring.

Spraying Baume 3 degree stone sulfur mixture 20 days before germination to control diseases and insect pests such as red spider, shell insect, rot and so on.