旱坡地枣园枣树丰产指标

连续4a研究表明，黄土丘陵区木枣稀植丰产园吊果比基本稳定在1．0－1．3之间；旱坡地木枣密植园4－5年生时，吊果比已经接近于1，5年以后超过1，亦即旱坡地木枣密植丰产园5年生时就已达到丰产园的要求。黄土丘陵区木枣丰产园有效枣股数量与产量的关系为y=-5.248165 1.37477x-0.039528x^2。旱坡地枣树稀植丰产园每公顷宜有效枣股数在150000－180000之间，产量在7500kg/hm^2左右，旱坡地枣树密植园，有效股数也应如此，不同的只是提早进入丰产期。

High Yield Index of Jujube Tree in Arid Hillside Garden

Continual four years studies showed that in loess hills area, the ratio of dropping shoot in the year to fruit of Muzao (jujube) sparse planting high yield garden kept steady between 1.0 and 1.3; and in close planting garden, when plants grew to be 4 to 5 years old, the ratio of dropping shoot in the year to fruit neared 1, and after 5 years, it surpassed 1, i.e. Muzao close planting garden 5 years after planting has reached requirements of high yield one. The relationship between the number of valid fruiting section and yield was described as =-5.248 165+1.374 774 x-0.039 528 x 2 in high yield garden. In arid sparse planting high yield garden, the number of suitable fruiting section per hectare was between 150 000 and 180 000, the yield was about 7 500 kg/hm 2, and in close planting one the number of valid fruting section should remain the same, but the garden entered into high yield period early.