摘要
[目的]为干旱、半干旱区农田施用PAM和SAP用量和方法提供理论依据。[方法]通过温室盆栽方法,分析聚丙烯酰胺(PAM)、保水剂(SAP)以及复配对作物根区土壤温度和生长过程的影响。[结果]在0～5 cm层深的土壤中添加PAM和SAP,可以改善根系周边土壤温度,与对照相比,土壤温度最大降幅达2～3℃,但对于添加PAM和SAP后15～20 cm层深的土壤,受阳光辐射强度弱、土壤含水率高且水分堵塞土壤空隙的影响,土壤温度比对照的有所提高,而且由于PAM空间锁水比SAP点状锁水效果更好,PAM的恒温作用要强于SAP。在作物生长初期,PAM和SAP对植物水分的补给作用尤为明显,有效增加作物鲜重和地下干物质积累,地上鲜重、地下鲜重与对照相比高出1～3倍,地下干重与对照相比提高1～2倍。[结论]将PAM和SAP应用在利用地下部分的经济作物和地上部分水分含量较高的作物增产效果会更加明显。
[Objective] The research aimed to provide the theoretical basis for using PAM and SAP application rates in arid and semi-arid farmland.[Method] With the greenhouse method,the effects of PAM,SAP and re-pairing on the soil temperature and crop growth in crop root zone.[Result] Adding PAM and SAP into 0 to 5 cm soil layer improved the soil temperature around the roots.Soil temperature was reduced by up to 2 to 3 ℃.But for the soil with the depth of 15-20 cm,under the condition of weak intensity of solar radiation,high moisture content and water clogging soil voids,soil temperature was increased.And PAM space lock water had a better effect than SAP point-like lock water,so PAM was stronger than SAP in thermosta.Early in the crop growth,the role of PAM and SAP in water supply was particularly clear,effectively increasing fresh crop weight on the ground and dry crop accumulation under the ground,fresh weight on the ground was 1 to 3 times higher than fresh weight under the ground.Dry weight under the ground was increased up 1 to 2 times.[Conclusion] When PAM and SAP was applied to the economic crops using the underground part and crop with ground part of the high moisture content,the yield was increased obviously.
出处
《安徽农业科学》
CAS
2013年第12期5315-5319,共5页
Journal of Anhui Agricultural Sciences
关键词
PAM
SAP
小麦生长影响
地温
水分供给
物质积累
PAM
SAP
Growth of wheat
Ground temperature
Supply of water
Material accumulation
