关键词: 日光温室, 辣椒, 营养液供应频率, 产量, 品质, 水分利用效率, Topsis 法
椒生育期和采收期

Abstract: In order to establish a precise water and fertilizer management mode for pepper bag culture in
solar greenhouse in Northern Shaanxi region，this experiment took‘Lafei 78-9’as test material；adopted
matrix bag culture method，and took water demand of single plant as standard；set up 5 nutrient solution supply
frequencies as once in one day，once in 2 days，once in 3 days，6 times in 3 days，and 4 times in 3 days；and
studied the effects of different nutrient solution supply frequency on yield，fruit quality and water use efficiency
of pouched overwinter pepper in solar greenhouse．The results showed that the treatment of supplying nutrient
solution for 6 times in 3 days and suplying nutrient solution once a day had obtained higher pepper yield．
Which were 10 161.66 kg · hm^-2 and 10 062.98 kg · hm^-2 ，respectively．The contents of reducing sugar，
VC and free amino acids in fruit treated with nutrient solution once a day were higher than those by the other
treatments．Besides，the water use efficiency by this treatment was also the highest（77.99 kg · m^-3）．The
yield，fruit quality and water use efficiency of pepper were evaluated by Topsis comprehensive method．The
results showed that the fitting degree was the highest when the nutrient solution was supplied once a day，
reaching 0.858．In conclusion，the comprehensive effect of supplying nutrient solution once a day is the best
for pepper bag culture in solar greenhouse Northern Shaanxi region．

Key words: solar greenhouse, pepper, nutrient solution supply frequency, yield, quality, water use efficiency, Topsis