WANG Liu, TIAN Jing, FENG Qian, PEI Qingyu, YIN Yilei, ZHANG Lingfeng, WANG Chunhui, LI Shao, PAN Shoujiang, LU Shaowei
Abstract:In the soilless cultivation of tomato in
intelligent greenhouse,the appropriate nutrient solution formula and
its dynamic adjustment strategy are the key to achieve high quality and high
yield.In this
paper,the
appropriate ratios of N/K,K/Ca/Mg,P/Ca,NH4+ /NO3- in diff
erent growth stages of tomato were elaborated.The effects of pH,water
alkalinity,hardness,total
dissolved salts and EC(electrical conductivity)value
of feeding water and nutrient solution on the availability of nutrients,growth
and development,yield
and quality of tomato were discussed.The concentration of nutrients in the
nutrient
solution and the appropriate content in
different parts of tomato plants were introduced.This paper also summarized the classic
standard formulations of tomato nutrient solution at home and abroad,and
its scope of application and changes in diff erent phenological growth periods.The
feasibility of the application of organic nutrient solution in soilless
cultivation of tomato were discussed.In this paper,the professional institutions,instruments
and equipment and online in-situ detection methods of nutrient solution testing
at home and abroad were introduced,as well as the method of dynamic adjustment
of nutrient solution formula and the online decision support system for
nutrient solution formula adjustment according to the target value of nutrient
solution in the root zone of tomato at diff erent growth stages.It was
proposed that the nutrient solution formula should
be dynamically adjusted according to
different tomato varieties,growth stages,feeding water quality and climatic conditions
to obtain the best yield and quality.It is s uggested that Chinese researchers
should speed up the research and development of on-line in-situ detection
equipment and on-line decision-making support system for dynamic adjustment of
nutrient solution,narrow the gap with f oreign advanced
countries,and
improve the intelligent level of dynamic adjustment of nutrient solution.This
paper can provide a reference for growers and technicians of soilless tomato
cult ivation in intelligent greenhouses.