氮磷氯配比对稻麦效应的研究

水稻对氯的忍耐力大于小麦。氯在各处理中的残留量为1％左右。大田中施用675kg/haNH_4Cl,配合适量磷肥不会造成危害。N、P、Cl对稻麦的穗长、穗数、千粒重无明显影响,对株高、鲜重、空壳率有显著的相关。在中、高量氯(1500～2000ppm)时,株高、鲜重明显降低,且有增加水稻空壳率的趋势;但提高P的浓度,空壳率又有所下降。因此,含氯化肥,特别是在缺磷的土壤上必须配施磷肥。植株茎叶中的N、P、K、Cl含量差异甚大,但最后转移进入籽粒的量都较接近。高量氯严重降低产量,但对品质无明显影响。稻麦收获后,土壤中N、P、Cl残留量与施入量有一定的相关性;但各元素不尽相同。

THE EFFECT OF COMBINED APPLICATION OF NITROGEN, PHOSPHORUS AND CHLORINE ON RICE AND WHEAT

Rice is more tolerant of chloride than wheat. If Cl mixed with a moderate rate of 675kg/ha NH_4Cl would not be harmful to the crops It has been found by Various analyses that N, P, Cl do not influence spike length, spike numbers and weight, but they have significant effect on plant height, fresh weight. Cl is no harmful effect on seed quality.conclusion makes it clear that after crops have been harvested, there is some correlativity between the quantity of the remains of N, P, Cl in the soil and the quantity of fertilizer applied, but it is not necessarly the same among the different elements.