This paper evaluates present nitrogen input amount，nitrogen use efficiency and soil fertility
contribution rate of greenhouse tomato，by analyzing 79 field experiments data from 57 domestic published papers.
The results showed that under conventional application model，the total nitrogen input was 1 313 kg·hm^-2，
including nitrogen 617 kg·hm^-2 from manure and 705 kg·hm^-2 from chemical fertilizer. Under optimized
application model the nitrogen from manure，chemical fertilizer and the total nitrogen input were 581.7 kg·hm^-2，
353 kg·hm^-2 and 936 kg·hm^-2，respectively. The tomato yield under optimized application model was 8% higher
than that of the conventional application model.Under conventional application model，the average values of partial
factor productivity（ PFP），agronomic efficiency（ AE） and recovery efficiency（ RE） were 155.7 kg·kg^-1，28.0
kg·kg-1 and 9.5%，respectively. Under the optimized application model，the average values of PFP，AE，RE
were 356.3 kg·kg^-1，63.6 kg·kg^-1 and 17.8%，respectively. The average soil fertility contribution of conventional
application and optimized application were 72.9% and 70.4%，respectively. So，compared with the conventional
application model，the optimized application model has great potential in reducing chemical nitrogen fertilizer.

Taking 43 cucumber varieties（ lines） of different types as experimental material，this paper put
the cucumber seedling under chilling stress（ day/night temperatures are 12 ℃ /9 ℃），and carried out evaluation
on low temperature tolerance with cold injury index as identification indicator. Eventually，7 varieties with
low temperature tolerance，10 varieties with low temperature sensitiveness were identified. The correlation
analysis was carried out on cucumber cold injury index（ Y） after low temperature treatment，the declined rate
of chlorophyll（ X₁） and the increased rates of soluble protein（X₂），MDA（X₃），proline（X₄）and POD
（X₅）. Then a regression equation for identifying cucumber low temperature tolerance was established：
Y=0.433+0.671X₁+0.005X₂+0.121X₃-0.733X₄+0. 248X₅

In early spring，under successive cold，rainy and cloudy climate condition，this experiment took
‘Nabite’ scions grafted onto‘ Yongzhen No.5’ as material，and exposed them under LED light and high voltage
sodium lamp for supplementary light of continuous 25 days，taking natural light as the contrast. The results showed
that artificial supplement light could obviously accelerate the growth of grafted watermelon seedlings. After the
17th day under supplementary light，the artificial supplement light treatments had great impact on the growth of
seedlings：the hypocotyl lengths of rootstock and scion were rapidly increased，the plant height was remarkably
enlarged，leaf areas became bigger，stems became thicker，biomass accumulation was fastened，chlorophyll
content was improved，photosynthetic capacity of leaf blades was strengthened，survival rate of grafted seedlings
was improved，diseases occurrence rate was reduced. Compared with different light resources，the effect of LED
light is better than that of high voltage sodium lamp. Moreover，LED light has lower input and usage cost in long
time running. LED light might become one of the most promising artificial supplementary lights in agriculture field
in the future.

Taking eggplant（Solanum melongena L.）‘Qiezhen No.1’as rootstock and‘ Kuaiyuanqie’as
scion，this experiment designed treatments with different temperatures（19 ℃，24 ℃，29 ℃）at night to study
the effect of different night temperature on the rate and quality of healing in tube grafted eggplant seedlings by
microscopic inspection．The results showed that the layers of callus cells were increased and the diameters of
joint part were enlarged．While，the process of vascular connection and healing was slowed down，the xylem
translocation ability was weakened，and the quality of healing was deteriorated．The isolation layer completely
disappeared，and vascular was connected on the 13th day after grafting under treatment with 19 ℃ at night．Compared
to the treatment with 29 ℃，the xylem translocation ability was improved by 72.89%．Under treatment with
29 ℃ at night more callus was observed on the 9th day，the diameter of joint part was significantly increased by
13.35%，compared to the treatment with 19 ℃ at night，but the healing process was slower．In conclusion，
under the condition of 29 ℃ day temperature，19 ℃ is the best night temperature for healing of tube grafted
eggplant．

Taking‘ Zhongnong No.26’ cucumber（Cucumis sativus L.）as material，and traditional peat
and vermiculite media as the contrast，this experiment mixed the paper mill sludge，Chinese herb medicine
residue and banana plant，according to different ratios as compost；then studied on the physical and chemical
properties of different mixed proportion substrates and their influences on the effects of cucumber seedling culture.
The results indicated that the mixed proportion substrates of paper mill sludge could meet the requirement of
seedling media．Among all treatments，T5（paper mill sludge︰banana plant=1 V︰1 V）compound substrate
could culture cucumber seedlings with the highest healthy index and the best growth effect．Except plant height，
its emergence rate，stem diameter，leaf number，chlorophyll content，dry and fresh weights，root -top ratio，G
value，etc. physiological indexes had nosignificant differences with the contrast（peat︰vermiculite=2 V︰1 V）. It
can be used as an ideal cucumber seedling culture substrates.

Aiming at obstacles of vegetable soil after successive cropping and deterioration of vegetable
quality in greenhouse，this paper takes tomato（Lycopersicon esculentum Mill.）grown in a greenhouse at
outskirts of Beijing in spring as research objective，and studies the effect of wood peat and other material as soil
conditioners on tomato yield，quality and facility soil improvement．The results showed that the yield of tomato
treated with wood peat plus potassium hydroxide（WP+KOH）increased 16.73%，and the VC content increased
55.77%．Meanwhile，the WP+KOH treatment also increase the contents of soil available nutrients and pH．The
treatments of wood peat，wood peat plus fungicide had no significant effects on fruit yield and quality and available
nutrients．All treatments by wood peat and other additional material had the trend of reducing soil surface salt
accumulation．Therefore，wood peat and its material mixture had a positive effectiveness on greenhouse tomato
growth and soil improvement．The WP+KOH treatment was the best.

This experiment studies the effect of different potassium levels on eggplant biomass，solanine content，solanine accumulation and distribution，so as to understand from plant nutrition view point how to control by certain extent the solanine formation and accumulation in eggplant，and then to improve the taste and flavor quality. Pot experiment was conducted in this experiment. The results indicated that eggplant fruit weight increase was distinct after applying potassium fertilizer. The solanine content in eggplant fruit was reduced remarkably after applying potassium fertilizer，that in other organs were also reduced. During 2 harvesting times，the solanine accumulation in eggplant fruit increased after applying potassium fertilizer，especially with moderate and large quantity of potassium fertilization. But that in fruit base，stem and flower showed declining tendency. The largest solanine distribution was observed in eggplant fruit ，then followed by leaf，and the least was in flower. While，solanine distribution coefficient in fruit base， flower，etc. organs were decreased along with the increase of potassium level. Applying potassium fertilizer could decrease the solanine content in eggplant fruit，which tended to increase solanine accumulation and distribution in eggplant fruit.

A composite model including crop leaf area index and water uptake was used to count tomato
plant daily water requirement quantity．Four different irrigation treatments were established（CK Experience
irrigation，W1 Equals simulation，W2 15% Lower than simulation，W3 25% Lower than simulation）to study
the effect of model simulation water requirement on tomato growth，yield，fruit quality and water use efficiency in
substrate culture with bag．The results indicated that the tomato plant height，stem diameter，fruit diameter，
photosynthetic rate and top dry weight declined along with the decrease of irrigation quantity．Under CK
treatment，the single plant yield was the highest（4.66 kg），which was 4.3%，23.3% and 47.9% higher than
that of W1，W2，and W3 treatmens，respectively，but the difference was not significant with W1 treatment．
The soluble sugar，sugar acid ratio，VC content were increased and the fruit quality was improved，along with
suitable reducing the irrigation quantity，wherein the W3 treatment was the best，W1 treatment took the second
place．Under W1 treatment，the water use efficiency was the highest（51.76 kg·m^-3），which was 10.3%，0.6%
and 5.9% higher than that of W1，W2，W3 treatments，respectively．In this experiment，W1 treatment，on the
basis of guaranteeing fruit yield and quality，has greatly improved the water use efficiency．The composite model
is suitable for water management application in tomato substrate cultivation.

Under greenhouse condition，this paper studied the bio-control efficiency of NBIN863 strain on
tomato root knot nematodes and its growth promotion effect and colonization ability on tomato. The result showed
that the bio-control efficiency of NBIN863 strain on tomato root knot nematode was up to 54.48%. Compared with
the blank control，the plant height，root length and total fresh weight were increased by 49.10%，43.69% and
52.50%，respectively. We found that NBIN863 strain could stably colonize in rhizophere at the concentration of
8.37×105cfu·g^-1 on the 30th day after inoculation.

Taking‘ Anqiudajiang’ as experimental material，this paper studies the effects of 5
bactericides spread on different ginger growth periods on controlling ginger bacterial wilt. The results indicated
that no remarkable influence on ginger seedling sprouting rate after soaking mother ginger in the bactericides
of Jiangwenjing AS（ astragalus polysaccharide，berberine，alkannin≥2.8%），45% Amobam AS，72%
streptomycin sulfate SP，3% Kejunkang WP，20% Saisentong SC before sowing. It is good for controlling ginger
bacterial wilt after using these 5 bactericides. The control effect of Jiangwenjing AS is the best reaching 92.6%，
and that of 3% Kejunkang WP takes the second place，reaching 90.5%. The income of using Jiangwenjing AS is
the highest，compared with the other treatments. It can reach 350，229 RMB·hm^-2.