摘要
在四川省温江县连续３年研究了水旱连作高产田复种方式的能量和养分转换效率。结果表明，产量在１５ｔ／ｈｍ￣２左右时，麦稻玉米（或马铃薯）三熟制的能量与养分投入多于麦稻两熟制，但能效与养分转换效率却相反。总能投入须１８～２５×１０￣４ＭＪ／ｈｍ￣２，Ｎ，Ｐ＿２Ｏ＿５和Ｋ＿２Ｏ投入分别为３５０～４００ｋｇ／ｈｍ￣２，１４０～１７０ｋｇ／ｈｍ￣２和３５０～４００ｋｇ／ｈｍ￣２。
In this experiment we studied ,for three continuous years,tbeconversion efficiency ofenergy and nutrient of three kind methods of multiple cropping in high-yield fields of wa-ter-dry continuous cropping in Wenjiong County , the western part of Sichuan Plain. Theresults indicate that the inputs of energy and nutrient in the system of wheat-rice-maize(or potato)three-cropping were more than that in the system of wheat -rice double-cropping, but reaction of conversion efficiency of energy and nutrient was opposite whenyield all over the year was about 15.0 t/hm￣2 . With this yield level,total energy inputsmust be 18.0～25. 0× 10￣4MJ/hm￣2; Inputs of N,P_2O_5 and K_2O must separately be,350.0～400. 0 kg/hm￣2,140.O～170.0 kg/hm￣2 and 350.0～400. 0 kg/hm￣2. More suitably, the sys-tem of wheat -rice double -cropping was chcsen for the aim of high yeild and high efficen-cy.
出处
《西南农业大学学报（自然科学版）》
CSCD
1995年第5期443-446,共4页
Journal of Southwest Agricultural University
