The Application of Automatic Control System for Drip Irrigation Under Plastic Film on Cotton Farming
Sun Li, Xi Chen, Jun Wang, Anming Bao, Qing Zhang · Ganhanqu ziyuan yu huanjing · 2006
Basing on computer control system,several kinds of sensors are used to collectand monitorfield environmental parameterssuch as soil moisture,soil temperature,atmosphere temperature,atmosphere relative humidity,amount of field evaporation and soil salt content etc.Combining these parametersand mathematical model,we can predictthe time and quantityof irrigation for cotton filed.According to the change of soil temperature and moisture from the computer contral system,it also can offer controlled imformation and transfer controlled sygnal for the automatic irrigation system.Associatingwiththe water-requiredrule of all cotton growing period,we can provide scientificand reasonable irrigation scheme.Cooperatewith the precise fertilizationas well,we can utilizewater saving equipmentmore effectively to reduce irrigation cost,promote the cotton's quality and yield.