A simultaneous emission reduction ch 4 with n 2 o and ways to improve soil fertility
A soil fertility and paddy field technology, applied in the field of simultaneous emission reduction of CH4 and N2O and improvement of soil fertility, can solve problems such as increasing CH4 emission, and achieve the effect of resource utilization, simple water management measures, and improvement of soil fertility
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Embodiment 1
[0026] 1.1 Test raw materials
[0027] The soil for the test was taken from the paddy fields in the suburbs of Beilun, Ningbo. The soil type was yellow soil. Before the experiment, the soil was dried and crushed, and debris such as stones and roots were sorted out. Rice straw was selected, dried before the test, mechanically crushed and passed through a sieve with an aperture of 2 mm.
[0028] 1.2 Test equipment
[0029] The transparent serum bottle was purchased from Shanghai Jingan Biotechnology Co., Ltd., specification: 500ml; gas chromatograph (Agilent7890A, USA).
[0030] 1.3 Experimental steps
[0031] 1) Weigh 1800g of air-dried paddy soil, mix evenly and distribute it in 12 cleaned transparent serum bottles, each serum bottle contains about 150g of paddy soil;
[0032] 2) Set the straw treatment (RS, the straw addition amount is 1% (m / m)) and the control without straw (CK), and set different water diversion methods including direct flooding (F) and gradual flooding ...
Embodiment 2
[0040] The experiment was carried out in a rice farmland in Lingxia Village, Beilun District, Ningbo City, Zhejiang Province. The farmland has many years of rice planting history and has typical southern paddy soil characteristics. The annual average temperature of this place is 16.5℃, and the annual average precipitation is about 1480mm. In September 2019, straw was applied as the main treatment, and the flooding method was used as a secondary treatment to carry out plot experiments. Make high ridges in the field to divide the farmland into four areas A, B, C, and D (the area of each area is about 6m×6m=36m 2 ), areas A and B are the control groups without straw, combined with direct flooding (A) and gradual flooding (B) respectively, and areas C and D are treatment groups with straw applied, combined with direct flooding (C ) and gradual flooding (D).
[0041] The rice stalks harvested in this field were dried and mechanically crushed to a length ≤ 2 cm before being scat...
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