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Irrigation method for promoting assimilation substance transfer in stems after paddy flowering and grain filling

An assimilation, post-flowering technology, applied in the agricultural field, can solve the problems of low running volume, low seed setting rate and low grain weight

Active Publication Date: 2015-12-30
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the problems of less amount of photosynthetic compound transporting to grains in rice stems after flowering, low seed setting rate and grain weight

Method used

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  • Irrigation method for promoting assimilation substance transfer in stems after paddy flowering and grain filling
  • Irrigation method for promoting assimilation substance transfer in stems after paddy flowering and grain filling
  • Irrigation method for promoting assimilation substance transfer in stems after paddy flowering and grain filling

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Embodiment

[0048] In 2013-2014, the local high-yielding japonica rice variety Wuyunjing 24 and the super hybrid indica variety Yangliangyou 6 were selected in Yangzhou (the two varieties were sold by Yangzhou Golden Land Seed Industry Co., Ltd.), and the high-yielding japonica rice variety Lianjing 7 was used in Lianyungang. No. (Jiangsu Wofeng Seed Industry Technology Co., Ltd. sells) carries out the field test of the irrigation method (new irrigation method for short) of the present invention's promotion of assimilate translocation and grain filling in the stem after flowering of rice, with local conventional irrigation (maintaining the water layer in the early stage of filling) , interstitial moist irrigation in the middle and late stages of grouting, and water cutoff 1 week before harvest) were used as controls. Except for the water management method from flowering to maturity, the new irrigation method and the control are completely consistent in other cultivation measures, such as s...

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Abstract

The invention belongs to the technical field of agricultures, is applied to irrigation of paddy from flowering to maturity, and particularly relates to an irrigation method for promoting assimilation substance transfer towards grains in the stems after paddy flowering and grain filling. The method comprises the step of determining a water potential index of leaves needing irrigation or a soil water content index at three stages that the day from the flowering to fifteen days after the flowering, from sixteen days after the flowering to thirty days, from thirty one days after the flowering to the maturity according to irrigation time and a soil type, so as to realize precise water management. By adopting the irrigation method, the problems of small transfer quantity of photosynthetic assimilation substances to the grains, slow grain filling and low maturing rate in stems of the paddy at high nitrogen level, modern high-yielding rice varieties, especially large-panicle type super hybrid rice varieties are solved.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and is used for irrigation from flowering to maturity of rice, in particular to an irrigation method for promoting the transfer of assimilates in stems of rice after flowering to grains and grain filling. Background technique [0002] Rice grain filling is the final stage of yield formation, and the quality of grain filling directly determines the level of grain weight and yield. The photosynthetic products required for grain filling of cereal crops come from two aspects: post-flowering photosynthesis and assimilates (mainly starch and soluble sugars) stored in the stem (stem + leaf sheath) before flowering. The assimilates stored in the stem before anthesis are not only a part of the grain filling material, but also an important material basis for the initiation of grain filling. The transport rate and amount of the assimilate affect the grain filling rate, and then affect the grain weight...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G25/00
CPCA01G25/00
Inventor 杨建昌张伟扬王志琴张耗
Owner YANGZHOU UNIV