海拔与密度对花生生育期及产量的影响

Effects of Altitude and Density on Growth Period and Yield of Peanut

为探明不同海拔高度下花生的适宜种植密度,设1.24万株/667m2、1.42万株/667m2、1.66万株/667m2、2万株/667m^2和2.48万株/667m^2 5个种植密度,分别在铜仁市470m、650m和800m^3个海拔高度地区进行海拔与密度对黔花生4号生育期及产量的影响试验。结果表明:随海拔高度的增加,花生生育期相应延长,高海拔和低海拔地区花生全生育期随密度增加呈增加趋势;花生主茎高、侧枝长表现为低海拔大于高海拔,单株总分枝数、有效分枝数、单株结果数、单株饱果数均随海拔高度增加呈先增后减趋势,随密度增加其变化各异;花生产量随海拔高度增加呈先增后减趋势,470m和650m地区均随密度增加呈先增后减趋势,且均在2万株/667m2时产量最高,分别为219.6kg/667m^2和316.9kg/667m^2,800m地区的适宜种植密度为2.48万株/667m^2,其产量最高,为195.7kg/667m^2。

The effects of three different altitudes（470m,650 mand 800m）and five planting densities（12.4 thousand plants/667m^2,14.2 thousand plants/667m^2,16.6 thousand plants/667m^2,20.0thousand/667m^2 and 24.8thousand plants/667m^2）on growth period and yield of Qianhuasheng 4（a peanut variety）were studied by the random block design to discuss the suitable planting density of Qianhuasheng 4under different elevation.Results：The growth period of Qianhuasheng 4correspondingly prolongs with altitude rise and growth period of Qianhuasheng 4planted in high and low altitude region shows a rising trend with increase of planting density.The main stem height and lateral branch length of Qianhuasheng 4planted in low altitude region are higher than in high altitude region.Total branches per plant,effective branches,peanuts per plant and full peanuts per plant of Qianhuasheng 4all present a first rising and then declining trend with altitude rise but planting density has different effects on total branches per plant,effective branches,peanuts per plant and full peanuts per plant of Qianhuasheng 4.The yield presents a first rising and then declining trend with altitude rise but the yield of Qianhuasheng 4planted the regions with 470 mand 650mshows a first rising and then declining trend with increase of planting density.The yield of Qianhuasheng 4planted the regions with 470 mand 650 m under 20.0thousand/667m^2 is the highest（219.6kg/667m^2 and 316.9kg/667m^2）.The highest yield of Qianhuasheng 4planted in the region with 800 munder the suitable planting density of 24.8thousand plants/667m^2 is 195.7kg/667m^2.