Fertilizer-saving method for increasing yield of double-crop rice through returning lolium perenne and straws to fields

A technology for ryegrass and double-cropping rice is applied in the field of agricultural production, fertilizer-saving and high-yield cultivation.

Inactive Publication Date: 2017-08-29
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term large-scale application of chemical fertilizers leads to soil compaction, deterioration of aggregate structure, decline in fertility, and deterioration of physical and chemical properties
At present, the reasonable utilization rate of straw resources in my country is low, only 20% to 36% are used as feed and fertilizer, and the burned and discarded straw is as high as 45% to 60%.
The phenomenon of crop straw burning is serious, which not only wastes organic fertilizer sources, but also seriously pollutes the environment

Method used

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  • Fertilizer-saving method for increasing yield of double-crop rice through returning lolium perenne and straws to fields
  • Fertilizer-saving method for increasing yield of double-crop rice through returning lolium perenne and straws to fields
  • Fertilizer-saving method for increasing yield of double-crop rice through returning lolium perenne and straws to fields

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The amount of ryegrass returned to the field is 30000kg / hm 2 In the late rice season, the early rice stalks are fully returned to the field. Under the same total nitrogen input conditions as the existing technology, compared with conventional fertilization measures, the nitrogen fertilizer input is reduced by 16.10%, and the early rice grain yield is increased by 5.89%, which has no effect on the formation of late rice grain yield. Significantly, increase the total grain yield of double-cropping rice by 1.59%, and reduce the N 2O emission was 45.85%; soil bulk density of plow layer decreased by 12.32%, soil organic matter content increased by 7.87%, cation exchange capacity increased by 11.25%, and carbon pool management index increased by 14.65%. It shows that the amount of returning ryegrass to the field is 30000kg / hm 2 Compared with conventional fertilization, returning full amount of early rice straw to the field in the late rice season can save urea input, and at ...

Embodiment 2

[0044] The amount of ryegrass returned to the field is 22500kg / hm 2 In the late rice season, the early rice stalks are fully returned to the field. Under the same total nitrogen input conditions as the existing technology, compared with conventional fertilization measures, the nitrogen fertilizer input is reduced by 13.98%, the grain yield of early rice is increased by 8.83%, and the grain yield of late rice is increased by 8.70%. Increase the total grain yield of double cropping rice by 8.76%, reduce the N 2 O emission was 34.22%; soil bulk density of plow layer decreased by 7.97%, soil organic matter content increased by 7.59%, cation exchange capacity increased by 8.94%, and carbon pool management index increased by 11.50%. It shows that the amount of ryegrass returned to the field is 22500kg / hm 2 Compared with conventional fertilization, the return of full amount of early rice straw in the late rice season did not significantly reduce the yield, and at the same time achie...

Embodiment 3

[0046] The amount of ryegrass returned to the field is 15000kg / hm 2 In the late rice season, the early rice stalks are fully returned to the field. Under the same total nitrogen input conditions as the existing technology, compared with conventional fertilization measures, the nitrogen fertilizer input is reduced by 11.86%, the grain yield of early rice is increased by 9.41%, and the grain yield of late rice is increased by 1.74%. Increase the total grain yield of double-cropping rice by 5.00%, and reduce the N 2 O emission was 17.28%; soil bulk density of plow layer decreased by 6.52%, soil organic matter content increased by 7.15%, cation exchange capacity increased by 5.57%, and carbon pool management index increased by 9.28%. It shows that the amount of ryegrass returned to the field is 15000kg / hm 2 Compared with conventional fertilization, the return of full amount of early rice straw in the late rice season did not significantly reduce the yield, and at the same time it...

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Abstract

The invention discloses a fertilizer-saving method for increasing yield of double-crop rice through returning lolium perenne and straws to fields and belongs to the technical field of fertilizer-saving and high-yield cultivation of agricultural production. The method comprises the following specific operating steps of subjecting fresh lolium perenne to turned-pressed field returning so as to replace part of nitrogen fertilizers during the growth of early rice, and returning straws of the early rice to the fields so as to replace part of the nitrogen fertilizers during the growth of late rice, thereby achieving the aims of soil fertility improving, nitrogen saving and high yield in a whole production cycle of the double-crop rice. According to the method, the problems of rice field cropping systems in the South of our country that the winter spare field area is enlarged, the rice field soil quality is lowered, the rice-production ecological cost is increased, the utilization rate of fertilizer is relatively low, and the like are solved, and the cultivation technique has the advantages that the yield of the double-crop rice is increased, the investment of chemical fertilizers is reduced, the utilization rate of fertilizer is increased, the soil tillage quality is improved, the yield is high, the nitrogen is saved, and the emission of N2O is reduced.

Description

technical field [0001] The invention belongs to the technical field of fertilizer-saving and high-yield cultivation in agricultural production. In particular, it relates to a method for improving the yield of double-cropping rice by returning ryegrass and straw to the field to save fertilizer. The specific performance is that during the growth period of early rice, fresh ryegrass is used to replace part of the nitrogen fertilizer, and during the growth of late rice, the straw of early rice is used. Part of the nitrogen fertilizer can be replaced in the field to achieve soil fertilization, nitrogen saving, and N reduction in the entire production cycle of double-cropping rice. 2 O emissions, high yield goals. Background technique [0002] Crop rotation refers to the method of planting different crops or multiple crop combinations sequentially between seasons and years on the same field, also known as multiple crop rotation. Reasonable crop rotation can eliminate or reduce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01C21/00A01B79/02A01G22/22
CPCA01B79/02A01C21/005A01G22/22Y02P60/21
Inventor 唐海明肖小平汤文光李超郭立君汪柯张帆程凯凯孙玉桃孙耿
Owner HUNAN AGRICULTURAL UNIV
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