Research On The Production Mechanism And Control Technology Of Tillered-onion

This experiment studied on tillered-onion growth dynamics, yield components, onion bulbsmechanism and product and benefit cultivation mode with the climate conditions in Changchunof Jilin province. In order to provide basic research data about the biological characteristics andthe growth law of tillered-onion. To determine the optimum sowing tillered-onion, to explorebulbs swollen of developmental mechanisms, lay the foundation for scientific the cultivation andmanagement techniques, to the development of tillered-onion offering help. Made the followingmain results:1.In order to comprehensive understanding of tillered-onion full-year growth dynamic,nutrition organs and reproductive organs of growth and development law and characteristics, bytillered-onion plant different kinds of the size and different sowing date treatment, the growth ofplants, bulbs swollen the biological characteristics of observation and experimental study.Results show that: different sowing date of tillered-onion plant have the same change trend inperiod of duration, the plant height, leaf number and enlargement of bulbs rate difference beforebulbs swollen, the late sowing date was faster grow, the opposite is low; Sowing date hasnothing to do with plant growth speed during the vegetative period. Bulb onion enlargementperiod has no obvious influence under the different sowing time, has nothing to do with theplant size, and the bulb growth stopped periods are basically consistent. In harvest,tillered-onion plants dry matter distribution rule in different organs: bulb>cauloid> leaf, and thematerial of bulb dry weight of whole plant more than70%of the total dry weight. The earliersowing date, the bigger the single bulb weight, but the number of tiller does not increase alongwith the advance of sowing date. The later sowing date,the lower the single bulb weight andyield of per plant. Sowing I free amino acids and soluble protein content in bulb are more higherthan another sowing dates, Each period content showed sowing I> sowing II>sowing III, theearly sowing date increased free amino acid accumulation in the early stage of the tillered-onionbulb. The earlier sowing date, the larger Soluble sugar accumulation of the tillered-onion bulbduring the bulb enlargement, the early sowing date increased soluble sugar accumulation in thelater stage of the tillered-onion bulb. During the early bulb enlargement,the POD activity is thehighest of tillered-onion, decreased gradually with the bulb enlargement.2.In order to clarify the effects of different kinds of plant size on plant growth and yield oftillered-onion, the test discusses the relationship of tillered-onion plant size between yield and commodity character, to reduce tillered-onion plant dosage and production cost in the premise ofhigh-yield, high-quality, providing a scientific basis reasonable used plant dosage fortillered-onion production. Results show that: the bigger onion size, the bigger stem diameter, themore leaf number when the engraftment of tillered-onion, but with little relationship betweentiller number and plant height. Bulb onion enlargement period has nothing to do with the onionsize and the plant size during vegetative growth period of tillered-onion. The yield oftillered-onion has a very significant positive correlation relationship with the onion size, singlebulb weight, tiller number and yield per plant. It also has a positive correlation relationship withthe bulb diameter and number of fleshy scales, but it has no significant relationship with bulblongitudinal diameter and layer number of membranous scales. Yield per plant and were higherwith larger the bulb; The bulbs size relation is not obvious with tiller number.3.Study on the effects of bolting on the quality and yield of the tillered-onion. The resultsshowed that bolting had some impacts on quality, dry matter distribution and yield of thetillered-onion. Bolting lead to decreased quality and yield of the tillered-onion. Compared withthe plants of no bolting and bolting, the results showed that no bolting bulb distribution ratio ofdry matter were significantly higher than those of bolting bulb. The single bulb weight of nobolting plants was significantly higher than those bolting plants. The total yields of no boltingplants were1.11times as much as bolting plants. The nutrient content of tillered-onion insequence from high to low is: not bolting plants> bolting plants, The nutrient content of nobolting bulb is higher than bolting bulb. The content of soluble sugar, soluble protein, vitamin C,pyruvate of no bolting plants were respectively higher than those of bolting plants11.7~15.2%,10.8~19.9%,3.5~9.3%,3.5~7.3%.4.In order to explore the best intercropping pattern of the tillered-onion, intercroppingchineseonion, sunflower and soybean in furrows. Study on effects of different intercroppingpatterns on growth characteristics and yield of the tillered-onion. The results showed thatdifferent intercropping patterns had a certain effect on the tillered-onion in each growth stage.Growth period of intercropping soybean pattern was earlier3-8d than no intercropping. Growthperiod of intercropping sunflower is the same with the contrast. Intercropping affects the growthof plants of tillered-onion, but the difference is not significant. Intercropping soybean decreasedthe content of Vc, intercropping sunflower and intercropping soybean can improve the contentof dry matter. Intercropping decreased the single bulb weight and tiller number, therebyreducing the yield, but output per unit area is significantly higher than contrast. In the five kindsof cultivation mode, r intercropping sunflower has the highest economic benefit, the second isintercropping soybean, respectively32.88%and10.98%higher than contrast.