盐土改良肥对制种甜高粱经济效益的影响

The Effects of Solonchak Amending Fertilizer of Economic Benefits on Seed Production of Sweet Sorghum

针对甘肃河西内陆灌区盐土存在的旱、涝、盐、瘦等特性，采用酸碱中和原理、离子交换原理、土壤结构改良原理，将自主研发的盐土调理剂、有机碳肥和甜高粱专用肥按比例合成盐土改良肥，并进行田间验证试验，以便对盐土改良肥对制种甜高粱经济效益作出科学的评价。结果表明：将盐土调理剂：有机碳肥：甜高粱专用肥重量比按0．0724：0．9051：0．0225合成的盐土改良肥，其施用量与制种甜高粱农艺性状、经济性状和产量之间呈显著的正相关关系。经回归统计分析，盐土改良肥经济效益最佳施肥量为23．75t／hm^2，制种甜高粱理论产量为2．76t／hm^2。施用盐土改良肥与施用传统化肥比较，制种甜高粱株高、茎粗、地上部分干重、根系干重、穗粒数、穗粒重、百粒重和产量增加6．39％、5．87％、5．26％、4．19％、6．38％、4．17％、4．42％和7．72％；增产值、施肥利润和投资效率增加5250．00元／hm^2、4107．80元／hm。和0．42无／无、

For the solonchak has drought, flood, salty and poor character in inland irrigation district of Hexi, The principle of acid base neutralization, ion exchange principle and soil structure improvement were adopted to compound solonchak amending fertilizer by salt soil conditioner, the organic carbon fertilizer and sweet sorghum special fertilizer, After field tests, the evaluate was given to the economic benefits on seed production of sweet sorghum of solonchak amending fertilizer. The results shown that： The weight ratio of solonchak amending fertil- izer was ： salt soil conditioner 0. 450 0, the organic carbon 0. 450 0, sweet sorghum special fertilizer 0. 100 0. The application amount was positively correlated with agronomic trait, economic trait and yield. After statistical regression, The suitable application amount was 23.75 t/hm^2, Theoretical yield of seed production of sweet sor- ghum was 2. 76 t/hm^2. Compared Furfural compound fertilizer and traditional fertilizer, the plant height , stem diameter, tops dry weight , root dry weight, The grain number, grain weight and 100 grain weight and yield increased6.39% ,5.87% ,5.26% ,4. 19% ,6. 38% ,4. 17% ,4. 42% and 7.72%. Unit yield inceement, fertilization profits and investment efficiency increased 5 250. 00 yuan/hm^2 ,4 107.80yuart/hm^2 and 0. 42 yuan/yuan.