滇中山坡旱地一年两熟作物需水量测定研究

Determining Research into Moisture Requirement of Annual Double Cropping on Hillside Arid Land in Central Yunnan

采用筒测法和田测法,对滇中山坡旱地一年两熟作物需水量及需水模数进行测定研究。结果表明,在满足大春作物玉米、小春作物小麦正常生长所需的土壤水份供给的条件下,筒测法测定结果为旱地年需水量11677 35t/hm2.田测法测定结果为旱地年需水量12620 25t/hm2.为指导云南省山坡旱地1年2熟作物节水栽培提供了一定的理论参考依据。

This paper reports the determined moisture requirement of annual double cropping on hillside arid land in Central Yunnan through both tubeform and field measurements. The results indicate that if the needy soil moisture is satisfied their normal growth of corn sown in early spring and wheat in late autumn, annual moisture requirement determined by tubeform measurement is 11?67735 t/hm2, and by field measurement is 12?62025 t/hm2, which provide, to a great extent, theoretical basis for guiding economical of water cultivation in Yunnan Province.