In order to reveal the effects of irrigation volume on regulating tomato growth and quality，this paper studied the changing rule of tomato growth，leaf photosynthetic parameters，yield，quality and metabolism related enzymes under different irrigation volumes（2.0，1.6，1.2，0.8，0.4 L · d^-1）using rootlimited soiless cultivation system．The results indicated that reducing irrigation volume could significantly limit tomato growth，decrease net photosynthetic rate（P_n），transpiration rate（T_r），intercellular CO₂ concentration（C_i），stomatal conductance（G_s） ，single plant yield and single fruit weight．But，reducing irrigation volume could significantly increase the contents of glucose，fructose，and VC；improve acid-sugar ratio in fruits，and gradually increase the contents of soluble sugar and titratable acid．Reducing irrigation volume could also reduce the activities of sucrose synthetase and phosphate sucrose synthetase in tomato fruit；improve the activities of neutral invertase and acid invertase，resulting in the decrease of sucrose content．By combing entropy weight method with TOPSIS method，the paper analyzed comprehensively various indexes．The results showed that 0.8 L was the best daily irrigation volume for tomato under soiless cultivation．

Taking tomato variety‘ Jingcai No. 6’ as test material，this paper studied the effects of different cultivation densities（CD）（3.8，5.0 plants · m^-2）and ion treatments（IT）（K⁺，Na⁺） on plant growth，fruit yield and fruit quality of substrate-cultivated tomato，and constructed TQI（tomato quality index）that could be used to comprehensively evaluate tomato fruit quality．The results showed that raising K⁺ concentration in nutrient solution could increase the contents of soluble sugar，soluble solid，sugar-to-acid ratio（SAR）and VC in the second tomato fruit set，without influencing tomato yield．Although cultivation density（CD） had no significant influence on tomato yield and quality，the content of organic acid and nitrite and SAR of the first tomato fruit set was significantly affected by CD×IT interaction．In addition，the second fruit set was the key for producing high quality tomato，and it showed the highest TQI when 3.8 plants · m^-2 combined with K+-rich nutrient solution．Taken together，it is suggested that in actual production controlling CD at 3.8 plants · m-2 and adopting irrigation with K⁺-rich nutrient solution could obtain high quality tomato and yet receive stable yield．

Countering the issues of frequent dusty weather in spring and insufficient greenhouse indoor light in southern Xinjiang，this study took ‘NS3389’ tomato as test material and LEDs as supplemental lightning sources to study the effects of 3 treatments on leaf photosynthetic behavior during the period at 6：00 to 22：00 local time．Using lower light intensity of 100 μmol · m^-2 · s^-1 as T1；relatively higher 200 μmol · m^-2 · s^-1 both before opening the curtain and closing it as T2；and self-supplementary lightning with 100 μmol · m^-2 · s^-1 after uncovering the greenhouse when the indoor light intensity was lower than 150 μmol · m^-2 · s^-1 as T3．The results showed that supplementary lightning treatment could effectively improve the photosynthetic performance and self-protection ability of tomato leaves．T1 has the highest net photosynthetic rate（P_n），improving the leaf photosynthesis by alleviating the stomatal limitation factor．Monitoring the carbon sequestration effect of functional leaves under different treatments，the results showed that the photosynthetic products of T1 and T2 for forming dry matter in fruits accounted for higher proportion in each leaf，and the attenuation range away from the fruit was smaller，meaning a better carbon fixation effect．The supplementary lightning treatment could significantly promote tomato plant growth，shorten anthesis time，and enhance the fruit yield．Economic analysis showed that both T1 and T2 had higher economic benefit and could be used as an effective supplementary lightning model for facility tomato production in southern Xinjiang．

The root system was directly heated by electric heating line．The substrate heating temperature was set at 22，28，34 ℃．The paper studied the root temperature field distribution under different temperature and its effect on growth and quality of tomato cultivated in soilless condition．The results showed that using coconut bran as substrate，setting up different heating temperatures could increase the average temperature in central substrate to 22.4，29.8，35.2 ℃ at night．Compared with the contrast without heating，heating to 22 ℃ and 28 ℃ could significantly increase the yield of single tomato plant，plant height，stem diameter，number of leaves，fresh/dry weight of root stem，VC，soluble sugar，soluble solid matter，soluble protein，titratable acid，etc. quality indexes．The energy consumption of single tomato plant treated at 22 ℃ was 11.33 kWh，which was significantly lower than 14.86 kWh treated at 28 ℃．

This paper adopted air source heat pump combined with pipeline ventilation method to heat the solar greenhouse，test indoor thermal environment，calculate the COP of air source heat pump，and compared the energy saving rate with the traditional coal-fired boiler．The test results showed that the average COP value of a typical sunny air source heat pump was 1.76，saving 23.4% energy compared with coal-fired boiler．Adopting air source heat pump to heat the greenhouse，the temperature of day time could reach 23.09 ℃，and 8.68 ℃ at night，compared with that of the contrast greenhouse increasing 6.95 ℃ and 3.99 ℃，respectively．The calefacient effect was obvious．At day time，the relative humidity was 47.45%，and 70.02% at night，reducing by 18.56 and 18.75 percent Point，respectively．The dehumidification effect was also obvious．

Taking tomato（Solanum lycopersicum L. ）cultivar‘Liaoyuan Duoli’as text material，this paper selected white light（W），and the other 3 LED light sources：red（R），blue（B）and green（G）to form 6 different combined light R9B1（9∶1，the proportion of the number of lights，the same below），R8B2，R7B3，R9G1，R8B1G1，and R7B2G1；and studied the effects of different LED light sources delayed supplementary lighting on tomato seedling growth in winter and spring solar greenhouse．The result showed that supplementary lighting of LED light source could promote the growth of tomato seedlings by different degrees．Among them，the effect of R7B2G1 was the most significant．Compared with the contrast without supplementary lighting，tomato stem diameter increased by 27.42%，fresh and dry weight of the whole plant increased by 17.84% and 30.91%，respectively and strong seedling index increased by 57.61%．In addition，seedling root system activity，chlorophyll content，net photosynthetic rate，and soluble sugar content of tomato leaves，etc. were all increased significantly．In summary，adding certain proportion of green light on red and blue lights basis could significantly promote the growth of tomato seedlings．

In order to strengthen the control of light/temperature environment in greenhouse and promote the rational vegetables production in Urumqi solar greenhouse during spring，this paper tested the indoor soil temperature，air temperature of different height and positions，solar light dynamic change，wall temperature and heat flow dynamic change in Urumqi under typical weather condition during spring．The results showed that in Urumqi the light condition inside of solar greenhouse was better．In a sunny day from 12：00 to 16：00，the highest illumination could reach 55 554 lx and the highest temperature was up to 48 ℃．But the indoor light distribution was uneven．In a sunny day，illumination intensity at the front part was higher than that at the rear part by 8 000-12 000 lx．The illumination intensity at 150 cm height was averagely higher than that at 50 cm height by 10 000-16 000 lx，showing the trait of the more closer to greenhouse thin film，the higher illumination intensity．Judging from the greenhouse span，in sunny days the greenhouse temperature at the rear part was slightly higher than that at middle and front part．The greenhouse back wall has heat preserving and heat storaging ability．The heat storage capacity per unit wall area was 1.97 MJ · m^-2．The heat releasing quantity was 0.79 MJ · m-²，which was 40.10% of the heat storage capacity．The soil temperature changes had obvious hysteretic nature，and along with the soil depth increasing，the hysteretic time would also be increased．

Taking virus-free Jiading garlic as test material，this paper studied the effects of water and fertilizer supply on the growth of tissue-cultured seedlings and bulbs and quality of the original seed，and the effects of subculture number and sowing time of tissue-cultured bulbs on quality of the original seed．Then，a production comparative experiment of virus-free original seed and conventional garlic seed was conducted．The optimum combination of treatments（tissue type：tissue culture bulb，32 hole disc，irrigation time of 30 min，fertilizer interval of 14 days）was screened out by water and fertilizer supply experiment．Compared with the 8-generation tissue-cultured bulbs，15-generation tissue-cultured bulbs were more suitable for the original breeding of Jiading garlic．Relative late sowing was beneficial to increase the proportion of normal lobes in the original seed bulbs，but it would significantly affect the accumulation of bulb biomass．In production comparative experiment，various growth index and bulb quality of virus-free garlic seed were remarkably superior than those of conventional garlic seed．Results of this experiment have provided technical support for realizing the industrialization of virus-free seedlings of Jiading garlic．

Taking‘Yidalishengcai’as test material，adopting greenhouse cultivation in spring and summer 2 seasons，this paper studied the effects of different substrate thickness（6，10，14 cm）on root system environment，yield and quality of lettuce．The results showed that the thicker was the substrate，the less was the rangeability in temperature of lettuce root system and moisture content of substrate．The leaf area and leaf number treated with 10 cm and 14 cm thickness were superior than that treated by 6 cm thickness．And the single plant fresh weight，dry weight，soruble protein，soruble solid matter and VC content were all higher than that treated by 6 cm thickness．While，the nitrate content was remarkably lower than that treated by 6 cm thickness．Overall considering the cultivation frame load-bearing and cost input，10 cm thick seedling culture substrate mixed with sheep manure compound substrate（3 V∶2 V）was suitable to be used in lettuce layered cultivation．

Aiming at the issues including current lacking of cabbage cultivars good for dehydrated processing，this study gained the CMS lines and inbred lines with targeted traits through 8 years hybridization and backcross，carried out the crosses of hybrid combination and variety test experiment，and successfully obtained the 2 new cultivars of cabbage for edible and dehydrated processing，‘Sugan 38’ and ‘Sugan 40’．In order to investigate the adaptability of these 2 new cultivars，the test planting experiment was conducted in Ningbo City in 2017-2018．Results showed that ‘Sugan 38’，‘Sugan 40’ were all adaptive for cultivation in Ningbo region．Among them，‘Sugan 40’ was more superior and suitable to be planted in autumn，‘Sugan 38’ was suitable for cultivation in spring．

‘Tietuo’ is a new tomato F₁ hybrid developed by crossing inbred line‘ T3-106’ as female parent and inbred line ‘Y12-105’ as male parent．It is of indeterminate growth type with strong growth vigor and mid-late maturity．Its matured fruit is shiny red in color．The single fruit weight is 150-170 g．Its contents of soluble solid，soluble sugar and titratable acid are 4.20%，2.99% and 0.63%，respectively．The sugar-acid ratio is 4.75．The VC content is 116.0 mg · kg^-1 and lycopene content is 21.9 mg · kg^-1．It can yield about 75-90 t · hm^-2．It is highly resistant to Fusarium wilt，resistant to root-knot nematode and TYLCV，and mid-resistant to CMV and TMV．It is suitable to be cultivated in southern region of China in spring and autumn．

‘Yinguan No.2’ is a mid-matured muskmelon F₁ hybrid developed by crossing inbred line ‘M5’as female parent and inbred line‘F4’as male parent．The plant has strong growth vigor．It bears fruits in order and matures in full accordance．Its growth period in plastic greenhouse is about 100 days in early spring．It can yield about 54.00 t · hm^-2．Its single fruit weight is 2.6 kg．In open field cultivation，its growth period is about 95 days．It can yield about 57.75 t · hm^-2．The single fruit weight is 3.5 kg．Fruit development period is 45-50 days．Its fruit is of short oval shape with green flesh．The fruit peel is white with fine overlapping curve．The fruit flesh is 6.0 cm in thickness．The central soluble solid content is 16.3%．In fields，its resistances to powdery mildew，downy mildew and gummy stem blight are equal to that of the contrast‘ Yindi’．The pedicel does not fall off when ripening．Its peel is firm and tenacious and tolerant to storage and transportation．It is suitable for planting in open and protected fields in Gansu，Shaanxi Provinces，Inner Mongolia and Xinjiang Autonomous Regions．

‘ Sukenuo 1505’ is a new fresh edible sweet and waxy corn F₁ hybrid bred by crossing inbred line‘ JSW13841’ as female parent and inbred line‘ JS0686’ as male parent．Its plant height is 224 cm，and ear height is 102 cm．Its ear is of conical shape，18.9 cm in length and 4.6 cm in diameter．There are 13.8 rows in each ear and 32.6 grains in one line．The spike-stalk and grain are black in color．The proportion of sweet and waxy grain is 1︰3．It has good flavor and tastes sweet and sticky after cooking．It has high and stable yield．It can yield 12-15 t · hm^-2．It is mid-resistant to maize blight．It takes about 86 days from sowing to harvesting．It is suitable to be planted in various regions of Jiangsu Province．