Study On Continuous Vegetable Cropping Obstacle And Trail Technology In Greenhouse Of Ningxia

Facility agriculture is one of the six tremendous leading industries in Ningxia Hui Autonomous Region, planting area expanding rapidly from15000hm2of2005to180000hm2of2013, and it played a positive role in leading the development of modern agriculture, promoting agricultural science and technology level, increasing the income of peasants and so on. But with the Ningxia facility agriculture cropping time gradually extended, continuous cropping obstacle is becoming more and more serious, strongly restricted the sustainable development of Ningxia equipment industry. To solve continuous cropping obstacle of facility agriculture for the healthy development modern agriculture in Ningxia is very urgent. Therefore, the author through field experiment and laboratory analysis, explore the main mechanism of continuous cropping obstacle. A comprehensive measures were suggested through the basal application of bio organic fertilizer, the base fertilizer, dipping root and spraying upper part with microbial fertilizer, drip irrigating biogas slurry with microorganism fertilizer to prevent and control horticultural crop disorder. The main results are as follows:1. Mechanism of different horticultural crop replant diseasesThrough the analysis of field investigation and indoor analysis, the main cause of horticultural crop replant disorder in Ningxia Yinchuan Helan Industrial Park and Ningxia Xiji Hualin company facilities agriculture park is the secondary salinization of soil and destruction of soil structure; the main causes of continuous cropping obstacle in horticultural crops in Xingqing District of Ningxia Yinchuan facilities agriculture park is doubled the number of soil nematodes; the main reason of continuous cropping obstacle in Helan county facilities park is soil salinization and soil microflora change; the main cause in the Cold Mountain Horticultural Crop replant diseases is due to the increased total phenolic acids in soil.2. Effect of integrated measures to control continuous cropping obstacle2.1The application effect in Greenhouse TomatoComprehensive prevention and treatment in a growth period promote the growth of tomato plants, increase productivity, reduce soil bulk density by0.03g.cm"3, increased soil porosity, improved soil structure, decreased water soluble salt content by166.01%in arch shed tomato compared with conventional treatment.2.2The application effect in Greenhouse young cucumberComprehensive prevention and treatment increased young cucumber plant height, stem diameter, the number of microorganisms, especially bacteria and actinomycetes in soil increased significantly, adding microbial fertilizer to kill nematodes nematode good effect, compared to conventional treatment to reduce33.97%, comprehensive treatment can increase yield significantly, with per mu yield of1714.96kg, comprehensive prevention measures have a certain role in the mitigation of caused by the increase of soil nematode population in continuous cropping obstacle of plant.2.3The application effect in Greenhouse melonComprehensive treatment significantly increased the number of microorganisms in soil, the number of bacteria and actinomycetes increased significantly, compared with the conventional treatment were increased by34.37%,17.57%, changed the composition of soil microbial flora, plants not infected with Fusarium oxysporum, growth, fruit quality, fruit shape index is good, obvious yield increasing effect, while the conventional office plants infected with Fusarium wilt the whole roof plant died, comprehensive prevention and control measures have a certain role in the mitigation of caused by the soil microflora change plant continuous cropping obstacle.2.4The application effect in Greenhouse pepperComprehensive treatment significantly increased the number of soil microorganisms, effects on the contents of phenolic acids in soil tired matter greatly, can reduce the content of phenolic acids in soil, decreasing by20.82%compared to conventional treatment, comprehensive prevention and control measures can mitigate the effect on crops caused by Autotoxicity of continuous cropping obstacle of plant.