印度科研人员推荐两种测定作物缺水的方法,一种是在大田作物地头或其他明显处,间或种几棵向日葵和凤仙花,因为这两种植物对水十分敏感,土壤稍缺水分,即呈萎蔫症状, 所以可将其作为干旱的指示作物.另一种方法,在大田地上随机选一处,挖一个1米左右的正方形土坑,挖出的土与5%的沙混匀,再埋入坑中,因坑土掺有5%的沙,所以蓄水能力低于全大田,一旦全大田土壤缺墒,坑上的作物提前1～2天显示出萎 Indian researchers recommend two methods for determining water scarcity in crops. One is to find sunflowers and impatiens in the fields or in other obvious places, because the two plants are very sensitive to water and the soil is slightly water-deficient , That is wilted symptoms, so it can be used as a drought indicator crop.Other way, in the field on the ground randomly selected one, dug a square about 1 m pit, dredged soil and 5% sand mixed , And then buried in the pit, because pit mixed with 5% of the sand, so the water storage capacity is lower than the whole field, once the whole field of soil lack of moisture, the pit on the crop 1 to 2 days ahead of wither