A fertilization method that can reduce rice cadmium content in cadmium-polluted paddy fields
A fertilization method and cadmium pollution technology, applied in fertilization methods, fertilization devices, agriculture, etc., can solve the problem of high cadmium content in rice and achieve the effect of reducing cadmium absorption in rice
Active Publication Date: 2021-08-06
HUNAN AGRICULTURAL UNIV
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[0005] In view of this, the embodiment of the present invention provides a fertilization method that can reduce the cadmium content of rice in cadmium-contaminated paddy fields, and the main purpose is to solve the problem of high cadmium content in rice in cadmium-contaminated paddy fields
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Embodiment 1
[0019] Test varieties: Xiangzaoxian 32 and Zhongjiazao 17 for early rice, Xiangwanxian 12 and Wuyou 308 for late rice; Fertilizers for testing:
[0020] Apollo Compound Fertilizer (N-P 2 o 5 -K 2 O:15-10-15≥40%);
[0021] This test was carried out in Jianfeng Village, Heshan District, Yiyang City in 2016. The cadmium content in the soil here is 0.6-0.7mg / kg, which is a moderately polluted area. A total of 7 treatments were designed in the experiment, which were F1(10:0:0:0), F2(8:2:0:0), F3(6:4:0:0), F4( 4:4:2:0), F5(2:5:3:0), F6(0:5:3:2) and no fertilization treatment CK, see Table 1; the total amount of fertilization is 80kg / mu, respectively Application of basal fertilizer, tillering fertilizer, ear fertilizer, and grain fertilizer; plots are randomly arranged in blocks, with an area of 28m2 2 , repeat 3 times. Artificial transplanting, early rice: 5 seedlings per hole, row spacing 16.7cm×20cm. Late rice: Xiangwanxian 12 has 3 grain seedlings per hole, with a row sp...
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The invention discloses a fertilization method capable of reducing cadmium content in cadmium-polluted rice fields, and relates to the technical field of agricultural planting. The method comprises the following steps: artificially planting rice in a cadmium-contaminated rice field; applying basal fertilizer one day before planting, applying tiller fertilizer at the tillering stage, and applying ear fertilizer at the booting stage; shallow water at the tillering stage to promote tillering, deep water at the heading stage 3-5cm, Keep the field moist during the rest of the period until half a month before harvest to drain and dry the field. The present invention can significantly reduce the cadmium content in the brown rice by adopting the staged fertilization technology, especially according to the fertilization ratio: 4:4:2:0 fertilization of base fertilizer, tiller manure, ear manure and grain manure, the rice cadmium content is the lowest. In particular, the tillering fertilizer should be re-applied, and the proportion of the tillering fertilizer should account for about 40%, and grain fertilizer cannot be applied at the same time; the present invention adopts the fertilization scheme of base fertilizer, tillering fertilizer and panicle fertilizer, which can reduce the cadmium absorption of rice better.
Description
technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a fertilization method capable of reducing the cadmium content of rice in cadmium-polluted paddy fields. Background technique [0002] Heavy metals such as cadmium, arsenic, chromium, and lead are deposited more and more in the soil, and these heavy metals accumulate in the plant body and brown rice through the absorption of rice, and eventually accumulate in the human body after human consumption, which brings great harm to human health. to serious harm. [0003] Nitrogen, phosphorus, and potassium fertilizers are essential nutrients for rice growth, and the accumulation and absorption of heavy metals by rice is related to the type and amount of fertilizers applied. There have been related studies on soil fertilizers, for example, the effects of different nitrogen fertilizers on the dissolution of heavy metals in soil contaminated by lead-zinc mine tailings and th...
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IPC IPC(8): A01C21/00
CPCA01C21/00
Inventor 敖和军肖欢吴勇俊
Owner HUNAN AGRICULTURAL UNIV